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Ellie can paint a room in 2 hours, and Diedre can paint the same room in 4 hours. How many minutes will it take Ellie and Diedre, working together, to paint the room?
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Explanation & Answer
Ellie paints 1/2 in 1 hour
Diede paints 1/4 in 1 hour
Both paint 3/4 in 1 hour
Full can be painted in 4/3 hours , 80 minutes.
Answer; 80 minutes
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Columbia Southern University
solve questions as instructed, data is attached *add screenshot when software as excel or other is usedPart 2: Confidence ...
Columbia Southern University
solve questions as instructed, data is attached *add screenshot when software as excel or other is usedPart 2: Confidence Intervals During the recovery from the Great Recession of 2007-2009, the economic situation for many families improved. However, in 2011 the recovery was slow and it was uncertain as to how much had really changed on the national level. To estimate the national average of the percent of low-income working families, a representative simple random sample of the percent of low-income working families from each of the country’s reporting jurisdictions could be used to calculate a point estimate and create a related confidence interval. With this confidence interval a better picture of the nation’s recovery can be had and legislative decisions can be made. 6. Describe in two or three sentences how a simple random sample of size n=20 could be obtained from the full list of jurisdictions provided for use with this assignment. 7. A researcher reported that a sample of size n=30 produced a sample mean of 32.56% and a sample standard deviation of 6.56%. Use this information to calculate a 90% confidence interval for the national average for the “percent of low-income working families”. Provide the upper and lower limits of the confidence interval and the margin of error. (Round the limits to two decimal places.) 8. Provide an explanation as to why it would be very unlikely that a different sample of size n=30 would produce the same confidence interval. 9. Provide an appropriate statistical interpretation of the 90% confidence interval found in number 7. 10. If a limited amount of federal funds have been allocated to assist jurisdictions whose “percent of low-income working families” exceeds a threshold based on the upper limit of a confidence interval, what would be the effect of using a confidence level that is higher than 90%? 11. If a public official requests funds based on a confidence interval provided by constituents in his/her district, would this raise any ethical concerns, or constitute a misuse of statistics, or both? Provide at least two sentences to respond to the situation presented. Part 3: Hypothesis Testing In 2011, the national percent of low-income working families had an approximately normal distribution with a mean of 31.3% and a standard deviation of 6.2% (The Working Poor Families Project, 2011). Although it remained slow, some politicians claimed that the recovery from the Great Recession was steady and noticeable. As a result, it was believed that the national percent of low-income working families was significantly lower in 2014 than it was in 2011. To support this belief, a spring 2014 sample of n=16 jurisdictions produced a sample mean of 29.8% for the percent of low-income working families, with a sample standard deviation of 4.1%. Using α=0.10 significance level, test the claim that the national average percent of low-income working families had improved by 2014. 12. Clearly restate the claim associated with this test, and state the null and alternate hypotheses. 13. Provide two or three sentences to state the type of test that should be performed based on the hypotheses. Additionally, state the assumptions and conditions that justify the appropriateness of the test. 14. Use technology to identify, and then provide the test statistic and the resulting P-value associated with the given sample results. Provide a statement that explains the interpretation of the P-value. (Print or copy-and-paste the output that identified these values, or any other form of evidence that technology was used.) 15. State, separately, both the decision/result of the hypothesis test, and the appropriate conclusion/statement about the claim.
Variables, Measurement, and SPSS, statistics homework help
To prepare for this Assignment:Review the Learning Resources as well as the SPSS resources found in this week’s Learning ...
Variables, Measurement, and SPSS, statistics homework help
To prepare for this Assignment:Review the Learning Resources as well as the SPSS resources found in this week’s Learning Resources.Review, download, and install the SPSS software on your computer using the IBM SPSS Version 23 Installation and Registration document for PC or for MAC in this week’s Learning Resources.Using the SPSS software, open the Afrobarometer dataset or the High School Longitudinal Study dataset (whichever you choose) found in this week’s Learning Resources and then choose two variables that interest you.For this Assignment:Write a 1- to 2-page summary and include the following:A description of what the each of the variables measure.A description of the unit of analysis.A description and explanation of the levels of measurement for each variable (i.e., nominal, ordinal, interval, ratio).Explain how you might conceive these variables to be used to answer a social change question. What might be the implications for social change?ResourcesFrankfort-Nachmias, C., & Leon-Guerrero, A. (2015). Social statistics for a diverse society (7th ed.). Thousand Oaks, CA: Sage Publications.
Chapter 1, “The What and the Why of Statistics” (pp. 1–26)Wagner, W. E. (2016). Using IBM® SPSS® statistics for research methods and social science statistics (6th ed.). Thousand Oaks, CA: Sage Publications.
Chapter 1, “Overview”Dietz, T., & Kalof, L. (2009). Introduction to social statistics: The logic of statistical reasoning. West Sussex, United Kingdom: Wiley-Blackwell.Introduction to Social Statistics: The Logic of Statistical Reasoning, 1st Edition by Dietz, T.; Kalof, L. Copyright 2009 by John Wiley & Sons - Books. Reprinted by permission of John Wiley & Sons - Books via the Copyright Clearance Center.
Chapter 1, “An Introduction to Quantitative Analysis” (pp. 1–31)Dietz, T., & Kalof, L. (2009). Introduction to social statistics: The logic of statistical reasoning. West Sussex, United Kingdom: Wiley-Blackwell.Introduction to Social Statistics: The Logic of Statistical Reasoning, 1st Edition by Dietz, T.; Kalof, L. Copyright 2009 by John Wiley & Sons - Books. Reprinted by permission of John Wiley & Sons - Books via the Copyright Clearance Center.
Chapter 2, “Some Basic Concepts” (pp. 33–63)
Grand Canyon University Probability Rules Statements Exercises
Directions: Use the following information to complete the assignment. While APA format is not required for the body of thi ...
Grand Canyon University Probability Rules Statements Exercises
Directions: Use the following information to complete the assignment. While APA format is not required for the body of this assignment, solid academic writing is expected, and documentation of sources should be presented using APA formatting guidelines, which can be found in the APA Style Guide, located in the Student Success Center. There are many misconceptions about probability which may include the following. All events are equally likelyLater events may be affected by or compensate for earlier onesWhen determining probability from statistical data, sample size is irrelevantResults of games of skill are unaffected by the nature of the participants“Lucky/Unlucky” numbers can influence random eventsIn random event involving selection, results are dependent on number rather than rationsIf events are random then the results of a series of independent events are equally likely The following statements are all incorrect. Explain the statements and the errors fully using the probability rules discussed in topic two. I have flipped and unbiased coin three times and got heads, it is more likely to get tails the next time I flip it. The Rovers play Mustangs. The Rovers can win, loose, or draw, so the probability that they win is 1/3. I roll two dice and ad the results. The probability of getting a total of 6 is 1/12 because there are 12 different possibilities and 6 is one of them. Mr. Purple has to have a major operation. 90% of the people who have this operation make a complete recovery. There is a 90% chance that Mr. Purple will make a complete recovery if he has this operation.I flip two coins. The probability of getting heads and tails is 1/3 because I can get Heads and Heads, Heads and Tails, or Tails and Tails. 13 is an unlucky number so you are less likely to win raffles with ticket number 13 than with a different dumber.
MEDIATION REGRESSION MODEL SPSS, APA format
Moderator Problem (Background):A Psychology Professor is interested in understanding the variability in final exam grades ...
MEDIATION REGRESSION MODEL SPSS, APA format
Moderator Problem (Background):A Psychology Professor is interested in understanding the variability in final exam grades for his 100-level freshman Psychology Statistics class. He hypothesizes that class absences would be negatively correlated with final exam grades, and that the students’ pre-college levels of math proficiency would be positively correlated with final exam grades. He also hypothesizes that the relationship between absences and final grades would be moderated by levels of Math proficiency. The professor collects data for 35 students. Based on Placement Test Scores, obtained during pre-semester orientation/registration, 12 students had low (Developmental level) Math skills. Thirteen students were proficient in basic 9th grade Arithmetic and Algebra only. And, 10 students had advanced Math skills at the Calculus level. Math levels were recorded as 1 = Low Math Skills; 2 = Moderate Skills, and 3 = High math skills.At the end of the semester, and for each student, the number of class absences was recorded, as were their final exam grades. Using the data appearing in the attached Week 3 Moderator “Statistics Grades.sav” SPSS data file, conduct a multiple regression analysis to examine the direct and interactive (moderator) effects of absences and Math level on final exam grades. Summarize the results using correct APA style. Be sure to include the appropriate Tables and Graphs. Please use my sample summary for moderation as a guide for your summary. As you’ll see, my sample summary shows you what statistics to present and summarize in your papers, and how to present them in APA style format.Assignment Requirements.Describe the sample, the goals of the study, and the variables employed to conduct the studyDescribe the analysis strategy – How will you analyze the data.State the Null and Alternative HypothesesConduct the multiple regression analysis in which grades is the DV (outcome), Math Levels, and Absences, as well as their centered interaction, are the IV (predictors).Present and summarize the results for the Multiple Regression Analysis – including the effects for both IVs as well as the interaction.Conduct, present, and summarize the results for the simple slopes analyses for each level of Math proficiency. So, using the split file procedure in SPSS you must conduct 3 simple regression analysis in which the variable Grades is the DV (outcome) and Absences is the IV (predictor).Create the appropriate table of results for the multiple regression analysis (you must refer to this table within the summary).Create the appropriate table for the simple slopes analyses.Create a simple slopes plot showing the regression of grades on absences for each Math level. You must refer to this figure within the summary.In the Week 2 forum you must submit the summary as an MS-Word file; and please submit the SPSS output in a separate file. That way I can see the analyses that you ran.Please carefully read my sample summary and model your summary after it. Also, you must read chapter 15 in the Warner text.Please note that this analysis and summary must be your own original work, you may not share you work with any classmates. I created the practice data and sample summary as an in-class problem, and I encourage you with work together on the practice problem. But not on the graded assignment3 hours agoATTACHMENTS
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solve questions as instructed, data is attached *add screenshot when software as excel or other is usedPart 2: Confidence ...
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solve questions as instructed, data is attached *add screenshot when software as excel or other is usedPart 2: Confidence Intervals During the recovery from the Great Recession of 2007-2009, the economic situation for many families improved. However, in 2011 the recovery was slow and it was uncertain as to how much had really changed on the national level. To estimate the national average of the percent of low-income working families, a representative simple random sample of the percent of low-income working families from each of the country’s reporting jurisdictions could be used to calculate a point estimate and create a related confidence interval. With this confidence interval a better picture of the nation’s recovery can be had and legislative decisions can be made. 6. Describe in two or three sentences how a simple random sample of size n=20 could be obtained from the full list of jurisdictions provided for use with this assignment. 7. A researcher reported that a sample of size n=30 produced a sample mean of 32.56% and a sample standard deviation of 6.56%. Use this information to calculate a 90% confidence interval for the national average for the “percent of low-income working families”. Provide the upper and lower limits of the confidence interval and the margin of error. (Round the limits to two decimal places.) 8. Provide an explanation as to why it would be very unlikely that a different sample of size n=30 would produce the same confidence interval. 9. Provide an appropriate statistical interpretation of the 90% confidence interval found in number 7. 10. If a limited amount of federal funds have been allocated to assist jurisdictions whose “percent of low-income working families” exceeds a threshold based on the upper limit of a confidence interval, what would be the effect of using a confidence level that is higher than 90%? 11. If a public official requests funds based on a confidence interval provided by constituents in his/her district, would this raise any ethical concerns, or constitute a misuse of statistics, or both? Provide at least two sentences to respond to the situation presented. Part 3: Hypothesis Testing In 2011, the national percent of low-income working families had an approximately normal distribution with a mean of 31.3% and a standard deviation of 6.2% (The Working Poor Families Project, 2011). Although it remained slow, some politicians claimed that the recovery from the Great Recession was steady and noticeable. As a result, it was believed that the national percent of low-income working families was significantly lower in 2014 than it was in 2011. To support this belief, a spring 2014 sample of n=16 jurisdictions produced a sample mean of 29.8% for the percent of low-income working families, with a sample standard deviation of 4.1%. Using α=0.10 significance level, test the claim that the national average percent of low-income working families had improved by 2014. 12. Clearly restate the claim associated with this test, and state the null and alternate hypotheses. 13. Provide two or three sentences to state the type of test that should be performed based on the hypotheses. Additionally, state the assumptions and conditions that justify the appropriateness of the test. 14. Use technology to identify, and then provide the test statistic and the resulting P-value associated with the given sample results. Provide a statement that explains the interpretation of the P-value. (Print or copy-and-paste the output that identified these values, or any other form of evidence that technology was used.) 15. State, separately, both the decision/result of the hypothesis test, and the appropriate conclusion/statement about the claim.
Variables, Measurement, and SPSS, statistics homework help
To prepare for this Assignment:Review the Learning Resources as well as the SPSS resources found in this week’s Learning ...
Variables, Measurement, and SPSS, statistics homework help
To prepare for this Assignment:Review the Learning Resources as well as the SPSS resources found in this week’s Learning Resources.Review, download, and install the SPSS software on your computer using the IBM SPSS Version 23 Installation and Registration document for PC or for MAC in this week’s Learning Resources.Using the SPSS software, open the Afrobarometer dataset or the High School Longitudinal Study dataset (whichever you choose) found in this week’s Learning Resources and then choose two variables that interest you.For this Assignment:Write a 1- to 2-page summary and include the following:A description of what the each of the variables measure.A description of the unit of analysis.A description and explanation of the levels of measurement for each variable (i.e., nominal, ordinal, interval, ratio).Explain how you might conceive these variables to be used to answer a social change question. What might be the implications for social change?ResourcesFrankfort-Nachmias, C., & Leon-Guerrero, A. (2015). Social statistics for a diverse society (7th ed.). Thousand Oaks, CA: Sage Publications.
Chapter 1, “The What and the Why of Statistics” (pp. 1–26)Wagner, W. E. (2016). Using IBM® SPSS® statistics for research methods and social science statistics (6th ed.). Thousand Oaks, CA: Sage Publications.
Chapter 1, “Overview”Dietz, T., & Kalof, L. (2009). Introduction to social statistics: The logic of statistical reasoning. West Sussex, United Kingdom: Wiley-Blackwell.Introduction to Social Statistics: The Logic of Statistical Reasoning, 1st Edition by Dietz, T.; Kalof, L. Copyright 2009 by John Wiley & Sons - Books. Reprinted by permission of John Wiley & Sons - Books via the Copyright Clearance Center.
Chapter 1, “An Introduction to Quantitative Analysis” (pp. 1–31)Dietz, T., & Kalof, L. (2009). Introduction to social statistics: The logic of statistical reasoning. West Sussex, United Kingdom: Wiley-Blackwell.Introduction to Social Statistics: The Logic of Statistical Reasoning, 1st Edition by Dietz, T.; Kalof, L. Copyright 2009 by John Wiley & Sons - Books. Reprinted by permission of John Wiley & Sons - Books via the Copyright Clearance Center.
Chapter 2, “Some Basic Concepts” (pp. 33–63)
Grand Canyon University Probability Rules Statements Exercises
Directions: Use the following information to complete the assignment. While APA format is not required for the body of thi ...
Grand Canyon University Probability Rules Statements Exercises
Directions: Use the following information to complete the assignment. While APA format is not required for the body of this assignment, solid academic writing is expected, and documentation of sources should be presented using APA formatting guidelines, which can be found in the APA Style Guide, located in the Student Success Center. There are many misconceptions about probability which may include the following. All events are equally likelyLater events may be affected by or compensate for earlier onesWhen determining probability from statistical data, sample size is irrelevantResults of games of skill are unaffected by the nature of the participants“Lucky/Unlucky” numbers can influence random eventsIn random event involving selection, results are dependent on number rather than rationsIf events are random then the results of a series of independent events are equally likely The following statements are all incorrect. Explain the statements and the errors fully using the probability rules discussed in topic two. I have flipped and unbiased coin three times and got heads, it is more likely to get tails the next time I flip it. The Rovers play Mustangs. The Rovers can win, loose, or draw, so the probability that they win is 1/3. I roll two dice and ad the results. The probability of getting a total of 6 is 1/12 because there are 12 different possibilities and 6 is one of them. Mr. Purple has to have a major operation. 90% of the people who have this operation make a complete recovery. There is a 90% chance that Mr. Purple will make a complete recovery if he has this operation.I flip two coins. The probability of getting heads and tails is 1/3 because I can get Heads and Heads, Heads and Tails, or Tails and Tails. 13 is an unlucky number so you are less likely to win raffles with ticket number 13 than with a different dumber.
MEDIATION REGRESSION MODEL SPSS, APA format
Moderator Problem (Background):A Psychology Professor is interested in understanding the variability in final exam grades ...
MEDIATION REGRESSION MODEL SPSS, APA format
Moderator Problem (Background):A Psychology Professor is interested in understanding the variability in final exam grades for his 100-level freshman Psychology Statistics class. He hypothesizes that class absences would be negatively correlated with final exam grades, and that the students’ pre-college levels of math proficiency would be positively correlated with final exam grades. He also hypothesizes that the relationship between absences and final grades would be moderated by levels of Math proficiency. The professor collects data for 35 students. Based on Placement Test Scores, obtained during pre-semester orientation/registration, 12 students had low (Developmental level) Math skills. Thirteen students were proficient in basic 9th grade Arithmetic and Algebra only. And, 10 students had advanced Math skills at the Calculus level. Math levels were recorded as 1 = Low Math Skills; 2 = Moderate Skills, and 3 = High math skills.At the end of the semester, and for each student, the number of class absences was recorded, as were their final exam grades. Using the data appearing in the attached Week 3 Moderator “Statistics Grades.sav” SPSS data file, conduct a multiple regression analysis to examine the direct and interactive (moderator) effects of absences and Math level on final exam grades. Summarize the results using correct APA style. Be sure to include the appropriate Tables and Graphs. Please use my sample summary for moderation as a guide for your summary. As you’ll see, my sample summary shows you what statistics to present and summarize in your papers, and how to present them in APA style format.Assignment Requirements.Describe the sample, the goals of the study, and the variables employed to conduct the studyDescribe the analysis strategy – How will you analyze the data.State the Null and Alternative HypothesesConduct the multiple regression analysis in which grades is the DV (outcome), Math Levels, and Absences, as well as their centered interaction, are the IV (predictors).Present and summarize the results for the Multiple Regression Analysis – including the effects for both IVs as well as the interaction.Conduct, present, and summarize the results for the simple slopes analyses for each level of Math proficiency. So, using the split file procedure in SPSS you must conduct 3 simple regression analysis in which the variable Grades is the DV (outcome) and Absences is the IV (predictor).Create the appropriate table of results for the multiple regression analysis (you must refer to this table within the summary).Create the appropriate table for the simple slopes analyses.Create a simple slopes plot showing the regression of grades on absences for each Math level. You must refer to this figure within the summary.In the Week 2 forum you must submit the summary as an MS-Word file; and please submit the SPSS output in a separate file. That way I can see the analyses that you ran.Please carefully read my sample summary and model your summary after it. Also, you must read chapter 15 in the Warner text.Please note that this analysis and summary must be your own original work, you may not share you work with any classmates. I created the practice data and sample summary as an in-class problem, and I encourage you with work together on the practice problem. But not on the graded assignment3 hours agoATTACHMENTS
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