Description
A t test involves comparing the average between two different groups. For example, a new curriculum was implemented at a middle school in the 2018–2019 school year in hopes of improving standardized test scores. To determine whether there was a difference in scores, leaders will conduct a t test using the data from the 2018–2019 school year and the previous school year, 2017–2018, as the two different groups. If scores improved, leaders are likely to implement it for the upcoming 2019–2020 school year to continue upward trends in student performance.
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Voting Methods
Beyond what you
reviewed in the required and recommended readings this week; different voting
methods are used to decide ...
Voting Methods
Beyond what you
reviewed in the required and recommended readings this week; different voting
methods are used to decide elections worldwide. Some countries, like Brazil,
elect their president using a two-round system, which is equivalent to the
instant runoff voting method. Other countries, like Mexico, use what is known
as the first-past-the-post system, which is equivalent to the plurality method.Research the
different electoral systems used worldwide and share a specific example.
Compare this country’s electoral system with the voting methods we examined in
this module. Based on fairness criteria, discuss your thoughts about the
fairness of this system.Your initial
post is due Thursday by midnight. A minimum of two follow up posts to your
classmates are due Sunday by midnight. Draw on lecture material and required
readings as you construct your post. Post your initial response early and check
back often to continue the discussion. Be sure to respond to your peers’ and
instructor’s posts, as well.Requirements
for Discussion Boards
Utilize and
interface with the required readings to analyze and engage the discussion
board questions.
Your initial
post should be roughly 200 words (plus or minus 10%). Each subsequent post
should be 100 words (plus or minus 10%)
The Normal Distribution
Which of the following best describes the probability distribution shown below?positively skewednegatively skewednormally ...
The Normal Distribution
Which of the following best describes the probability distribution shown below?positively skewednegatively skewednormally distributedcontinuous probability distributionWhich of the following histograms represents the data set given below?A.B.C.D.Which of the following could best be represented using a continuous probability distribution?The frequency for which different sized flat rate boxes are purchased at a post office.The frequency of temperatures throughout the day in Florida on April 25th.The frequency of different scores achieved on an Algebra test in a class of 30 students.The number of students who use the internet for at least one hour after school.Which of the following best describes the data given in the table below?positively skewednegatively skewednormally distributednone of the aboveIQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What percentage of people have an IQ between 130 and 100?13.5%47.5%95%27%Which of the following best describes the probability distribution shown below?positively skewednegatively skewednormally distributedcontinuous probability distributionThe diagram below shows a normal distribution. 68% of the values fall within the shaded region, and x with bar on top is the mean. The scores in the shaded region range from 25 to 35. What is the mean of the values in the distribution?5103060The diagram below shows a normal distribution. 68% of the values fall within the shaded region, and is the mean. The scores in the shaded region range from 25 to 35. What is the standard deviation of the values in the distribution?5103060The number of home runs scored by teams in the Fayetteville baseball league are normally distributed and have a mean of 91 and a standard deviation of 12. What percentage of the teams have scored more than 115 home runs?2%13.5%15.5%98%The number of hours that college freshman spend studying each week is normally distributed with a mean of 8 hours and a standard deviation of 5.5 hours. What percentage of students spend between 2.5 and 19 hours studying each week?34%68%47.5%81.5%
Testing Hypotheses for Means, statistics homework help
As an international development researcher, you would like to know African Citizen’s perceptions about current levels of ...
Testing Hypotheses for Means, statistics homework help
As an international development researcher, you would like to know African Citizen’s perceptions about current levels of democracy. Your working hypothesis is that a series of reforms have increased African views of the level of democracy today. You do not have a good research design to compare attitudes before and after the reforms, but know that leaders and development experts would like to see a value of 6, on the scale of 1–10. Using the data from the 2015 Afrobarometer, determine whether perceptions about current levels of democracy statistically differ from a value of 6. Please provide: a 1–2 APA style paragraph statement that furnishes an answer to this question, note the relevant statistics, comment on meaningfulness and include your relevant SPSS output. 2. As an international development researcher, you have already tested whether perceptions about the current levels of democracy differ from a value of 6. Given recent social change movements in North Africa, you now want to determine whether there is a statistical difference in these perceptions between North Africa and Southern Africa. Using the data from the 2015 Afrobarometer, please provide: a 1–2 APA style paragraph statement that furnishes an answer to this question, note the relevant statistics, comment on meaningfulness, and include your relevant SPSS output. 3. As an educational researcher, would like to know whether high school student’s perceptions about mathematical utility changed between their freshman and senior year. Each respondent is asked the same series of questions about the utility of mathematics in their future during their freshman and senior year. These questions are combined to form one variable of mathematical utility; higher values indicate higher levels of mathematical utility. Using the High School Longitudinal Survey, please provide: a 1–2 APA style paragraph statement that furnishes an answer to this question, note the relevant statistics, comment on meaningfulness, and include your relevant SPSS output. To prepare for this Assignment: Review the Learning Resources and the media programs related to t tests.Also, review the t test scenarios found in this week’s Learning Resources and consider the three different approaches of t tests:Independent sample t testPaired sample t testOne sample t testBased on each of the three research scenarios provided, open the High School Longitudinal Study dataset or the Afrobarometer dataset from this week’s Learning Resources using SPSS software, then choose and run the appropriate t test.Once you perform your t test analyses, review Chapter 11 of the Wagner text to understand how to copy and paste your output into your Word document. For this Assignment: Write a 2- to 3-paragraph analysis of your t test results for each research scenario and include the SPSS syntax and output. Based on your results, provide an explanation of what the implications of social change might be. Use proper APA format, citations, and referencing for your analysis, research questions, and output. By Day 7
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The primary objective of this project will be to perform a few hypothesis tests, make inferences on the test statistics, a ...
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RSCH 8210 Walden University Week 9 Multiple Regression Analysis Discussion
To prepare for this Discussion:Review this week’s Learning Resources and media program related to multiple regression.Cr ...
RSCH 8210 Walden University Week 9 Multiple Regression Analysis Discussion
To prepare for this Discussion:Review this week’s Learning Resources and media program related to multiple regression.Create a research question using the General Social Survey that can be answered by multiple regression.By Day 3Use SPSS to answer the research question. Post your response to the following:What is your research question?What is the null hypothesis for your question?What research design would align with this question?What dependent variable was used and how is it measured?What independent variable is used and how is it measured?What other variables were added to the multiple regression models as controls?What is the justification for adding the variables?If you found significance, what is the strength of the effect?Explain your results for a lay audience, explain what the answer to your research question.Be sure to support your Main Post and Response Post with reference to the week’s Learning Resources and other scholarly evidence in APA Style.REQUIRED READINGSFrankfort-Nachmias, C., Leon-Guerrero, A., & Davis, G. (2020). Social statistics for a diverse society (9th ed.). Thousand Oaks, CA: Sage Publications.Chapter 12, “Regression and Correlation” (pp. 401-457) (previously read in Week 8)Wagner, III, W. E. (2020). Using IBM® SPSS® statistics for research methods and social science statistics (7th ed.). Thousand Oaks, CA: Sage Publications.Chapter 11, “Editing Output” (previously read in Week 2, 3, 4, 5. 6, 7, and 8)By Day 5Respond to at least one of your colleagues’ posts and comment on the following:Do you think the variables are appropriately used? Why or why not?Does the addition of the control variables make sense to you? Why or why not?Does the analysis answer the research question? Be sure and provide constructive and helpful comments for possible improvement.If there was a significant effect, comments on the strength and its meaningfulness.As a lay reader, were you able to understand the results and their implications? Why or why not?
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Voting Methods
Beyond what you
reviewed in the required and recommended readings this week; different voting
methods are used to decide ...
Voting Methods
Beyond what you
reviewed in the required and recommended readings this week; different voting
methods are used to decide elections worldwide. Some countries, like Brazil,
elect their president using a two-round system, which is equivalent to the
instant runoff voting method. Other countries, like Mexico, use what is known
as the first-past-the-post system, which is equivalent to the plurality method.Research the
different electoral systems used worldwide and share a specific example.
Compare this country’s electoral system with the voting methods we examined in
this module. Based on fairness criteria, discuss your thoughts about the
fairness of this system.Your initial
post is due Thursday by midnight. A minimum of two follow up posts to your
classmates are due Sunday by midnight. Draw on lecture material and required
readings as you construct your post. Post your initial response early and check
back often to continue the discussion. Be sure to respond to your peers’ and
instructor’s posts, as well.Requirements
for Discussion Boards
Utilize and
interface with the required readings to analyze and engage the discussion
board questions.
Your initial
post should be roughly 200 words (plus or minus 10%). Each subsequent post
should be 100 words (plus or minus 10%)
The Normal Distribution
Which of the following best describes the probability distribution shown below?positively skewednegatively skewednormally ...
The Normal Distribution
Which of the following best describes the probability distribution shown below?positively skewednegatively skewednormally distributedcontinuous probability distributionWhich of the following histograms represents the data set given below?A.B.C.D.Which of the following could best be represented using a continuous probability distribution?The frequency for which different sized flat rate boxes are purchased at a post office.The frequency of temperatures throughout the day in Florida on April 25th.The frequency of different scores achieved on an Algebra test in a class of 30 students.The number of students who use the internet for at least one hour after school.Which of the following best describes the data given in the table below?positively skewednegatively skewednormally distributednone of the aboveIQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What percentage of people have an IQ between 130 and 100?13.5%47.5%95%27%Which of the following best describes the probability distribution shown below?positively skewednegatively skewednormally distributedcontinuous probability distributionThe diagram below shows a normal distribution. 68% of the values fall within the shaded region, and x with bar on top is the mean. The scores in the shaded region range from 25 to 35. What is the mean of the values in the distribution?5103060The diagram below shows a normal distribution. 68% of the values fall within the shaded region, and is the mean. The scores in the shaded region range from 25 to 35. What is the standard deviation of the values in the distribution?5103060The number of home runs scored by teams in the Fayetteville baseball league are normally distributed and have a mean of 91 and a standard deviation of 12. What percentage of the teams have scored more than 115 home runs?2%13.5%15.5%98%The number of hours that college freshman spend studying each week is normally distributed with a mean of 8 hours and a standard deviation of 5.5 hours. What percentage of students spend between 2.5 and 19 hours studying each week?34%68%47.5%81.5%
Testing Hypotheses for Means, statistics homework help
As an international development researcher, you would like to know African Citizen’s perceptions about current levels of ...
Testing Hypotheses for Means, statistics homework help
As an international development researcher, you would like to know African Citizen’s perceptions about current levels of democracy. Your working hypothesis is that a series of reforms have increased African views of the level of democracy today. You do not have a good research design to compare attitudes before and after the reforms, but know that leaders and development experts would like to see a value of 6, on the scale of 1–10. Using the data from the 2015 Afrobarometer, determine whether perceptions about current levels of democracy statistically differ from a value of 6. Please provide: a 1–2 APA style paragraph statement that furnishes an answer to this question, note the relevant statistics, comment on meaningfulness and include your relevant SPSS output. 2. As an international development researcher, you have already tested whether perceptions about the current levels of democracy differ from a value of 6. Given recent social change movements in North Africa, you now want to determine whether there is a statistical difference in these perceptions between North Africa and Southern Africa. Using the data from the 2015 Afrobarometer, please provide: a 1–2 APA style paragraph statement that furnishes an answer to this question, note the relevant statistics, comment on meaningfulness, and include your relevant SPSS output. 3. As an educational researcher, would like to know whether high school student’s perceptions about mathematical utility changed between their freshman and senior year. Each respondent is asked the same series of questions about the utility of mathematics in their future during their freshman and senior year. These questions are combined to form one variable of mathematical utility; higher values indicate higher levels of mathematical utility. Using the High School Longitudinal Survey, please provide: a 1–2 APA style paragraph statement that furnishes an answer to this question, note the relevant statistics, comment on meaningfulness, and include your relevant SPSS output. To prepare for this Assignment: Review the Learning Resources and the media programs related to t tests.Also, review the t test scenarios found in this week’s Learning Resources and consider the three different approaches of t tests:Independent sample t testPaired sample t testOne sample t testBased on each of the three research scenarios provided, open the High School Longitudinal Study dataset or the Afrobarometer dataset from this week’s Learning Resources using SPSS software, then choose and run the appropriate t test.Once you perform your t test analyses, review Chapter 11 of the Wagner text to understand how to copy and paste your output into your Word document. For this Assignment: Write a 2- to 3-paragraph analysis of your t test results for each research scenario and include the SPSS syntax and output. Based on your results, provide an explanation of what the implications of social change might be. Use proper APA format, citations, and referencing for your analysis, research questions, and output. By Day 7
16 pages
M Hypothesis Testing Week 6
Here we are testing claims about the TRUE POPULATION’S STATISTICS based on SAMPLES we have taken. The most common statis ...
M Hypothesis Testing Week 6
Here we are testing claims about the TRUE POPULATION’S STATISTICS based on SAMPLES we have taken. The most common statistic of interest is of course ...
4 pages
Mth 102 Milestone 3
The primary objective of this project will be to perform a few hypothesis tests, make inferences on the test statistics, a ...
Mth 102 Milestone 3
The primary objective of this project will be to perform a few hypothesis tests, make inferences on the test statistics, and state null/alternative ...
RSCH 8210 Walden University Week 9 Multiple Regression Analysis Discussion
To prepare for this Discussion:Review this week’s Learning Resources and media program related to multiple regression.Cr ...
RSCH 8210 Walden University Week 9 Multiple Regression Analysis Discussion
To prepare for this Discussion:Review this week’s Learning Resources and media program related to multiple regression.Create a research question using the General Social Survey that can be answered by multiple regression.By Day 3Use SPSS to answer the research question. Post your response to the following:What is your research question?What is the null hypothesis for your question?What research design would align with this question?What dependent variable was used and how is it measured?What independent variable is used and how is it measured?What other variables were added to the multiple regression models as controls?What is the justification for adding the variables?If you found significance, what is the strength of the effect?Explain your results for a lay audience, explain what the answer to your research question.Be sure to support your Main Post and Response Post with reference to the week’s Learning Resources and other scholarly evidence in APA Style.REQUIRED READINGSFrankfort-Nachmias, C., Leon-Guerrero, A., & Davis, G. (2020). Social statistics for a diverse society (9th ed.). Thousand Oaks, CA: Sage Publications.Chapter 12, “Regression and Correlation” (pp. 401-457) (previously read in Week 8)Wagner, III, W. E. (2020). Using IBM® SPSS® statistics for research methods and social science statistics (7th ed.). Thousand Oaks, CA: Sage Publications.Chapter 11, “Editing Output” (previously read in Week 2, 3, 4, 5. 6, 7, and 8)By Day 5Respond to at least one of your colleagues’ posts and comment on the following:Do you think the variables are appropriately used? Why or why not?Does the addition of the control variables make sense to you? Why or why not?Does the analysis answer the research question? Be sure and provide constructive and helpful comments for possible improvement.If there was a significant effect, comments on the strength and its meaningfulness.As a lay reader, were you able to understand the results and their implications? Why or why not?
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