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Unit 8 Project
Find the next five terms of the arithmetic sequence 42, 37, 32, ... . Find the 24th term of an arithmetic sequence for whi ...
Unit 8 Project
Find the next five terms of the arithmetic sequence 42, 37, 32, ... . Find the 24th term of an arithmetic sequence for which a1 = 2 and d = 6.
1 page
Hmwk 19 Ch 26 27 Mod 1
CT 107 Hmwk #19 Answer Coversheet -Show your work by attaching your homework. Therefore, a thin object that is 6ft (72in) ...
Hmwk 19 Ch 26 27 Mod 1
CT 107 Hmwk #19 Answer Coversheet -Show your work by attaching your homework. Therefore, a thin object that is 6ft (72in) long can fit diagonally in ...
MTH 154 Northern Virginia Community College Quantitative Reasoning Word Problem Paper
Instructions: Work problems on a separate sheet of paper and attach work to this page. You shouldshow all work. Questions ...
MTH 154 Northern Virginia Community College Quantitative Reasoning Word Problem Paper
Instructions: Work problems on a separate sheet of paper and attach work to this page. You shouldshow all work. Questions with compact answers can be recordeddirectly on this page. Graphs and longer answers that won’t fit here, indicate which page of the workthe answer can be found on and be sure to clearly indicate it on the attached pages. You may use Excelto complete the problems, but then submit Excel files online.1. A newspaper article on drunk driving cited data on traffic deaths in Rhode Island: “Forty-twopercent of all fatalities occurred on Friday, Saturday and Sunday, apparently because ofincreased drinking on the weekends.” What percent of the week do Friday, Saturday andSunday represent? Are you surprised that 42% of fatalities occur on those days? How mightdata for the number of cars on the road on those days possibly change or reinforce thatperception?2. An article in a Midwestern newspaper about flight delays at a major airport said: ‘According to aGannet News Service study of US airline’s performance during the past five months, Chicago’sO’Hare Field scheduled 114,370 flights. Nearly 10%, 1,136 were canceled.’ Check the paper’sarithmetic. What percent of scheduled flights were actually cancelled?3. The number of Americans living below the poverty line increased from 24,975,000 to 43,569,000in the 34 years between 1976 and 2009. What percentage increase was this? You should notconclude from this that poverty grew more common in the US during these years. Why not?4. Do a search for ‘dubious statistics’ on the web. Select one of the articles. Describe the dubioususe of statistics in the cited research. What makes the use of stats dubious in the case youchose?5. Go to the website http://www.census.gov/ and select a statistic they measure to analyze. It’spreferable to choose something that changes over time. Choose two data points and describethe percentage change between them. Be sure to clearly state that statistics you are using andthe dates associated with them.6. Create a pie chart for the following data. Copy the data into Excel and create a summary tableto start. A sample of 20 students who had recently taken elementary statistics yielded thefollowing information on the brand of calculator owned (T=Texas Instrument, H=HewlettPackard, C=Casio, S=Sharp). Be sure that your graph is properly labeled, displays the percentsand has a title.T T H T C T T S C HS S T H C T T T H T7. Below are a series of graphs. Interpret the graph. For time series graphs compare informationfrom two points in time and say something about the information obtained from the graph. Isthere a better way of displaying the data that might make the comparison you choose moresalient? Explain what kind of graph you are looking at. If this qualifies as a ‘bad graph’ what isbad about it?a)b)c)d)e)f)g)h)8. Using the Excel file 154data2.xlsx to answer the questions below:a. Create a comparative Bar Graph of States of Birth for American Presidents, and a separateone for the state they represented at the time they were elected. Write a paragraphsummarizing the graphs.b. Use the data on the Favorite Day to Eat Out to create a pie or donut graph of the data. Besure it is properly labeled and is easy to understand. Write a sentence or two thatsummarizes the result.c. Use the data on percent of poverty on the third sheet to create a line graph of the data.d. Use the same data to calculate the percent change from year to year. Then make a linegraph of the resulting data. Note: Percent change should be signed, so that an increase willbe positive, and a decrease will be negative. Make sure your line graphs have axis labels, atitle and are easy to read.
NorthWest Arkansas Community College Regression Statistics Exam Practice
QUESTION 1Given the data below, a researcher would like to know whether someone's age group affects their choice of toilet ...
NorthWest Arkansas Community College Regression Statistics Exam Practice
QUESTION 1Given the data below, a researcher would like to know whether someone's age group affects their choice of toilet paper brand. Observed Brand A Brand B Brand C SumTeen 120 130 110 360Mid-Age 77 127 140 344Senior 84 100 98 282 281 357 348 986A complete answer should:Indicate which test she should use.State hypothesesReport if the test was significant and what decision is madeRun any necessary post-hoc analysis (and paste the result in the answer)Provide a conclusion sentence and the statistics in APA format.QUESTION 2A tutor measures her students with a 5 point algorithm, and she would like to know if her 6 students improved this month.Student Day 1 Day 30A 2.4 3.0B 2.5 2.8C 3.0 2.9D 2.9 2.4E 2.7 3.5F 2.1 2.9A complete answer should:Indicate which test she should use.State hypothesesReport if the test was significant and what decision is madeProvide a conclusion sentence and the statistics in APA format.QUESTION 3:For the following output, write a paragraph (3-4 sentences) discussing the result. Your paragraph should indicate:What test was usedWhat the test measuresWhether the test is significantWhat the result/decision was in terms of the variables and if any additional testing is necessary.Report the statistics in APA format.Make a statement of conclusion about what a researcher would learn from this result. (You may create what causes the differences in groups such as: location, worksheets, demographics, etc.)SUMMARY OUTPUT Regression Statistics Multiple R 0.237673 R Square 0.056489 Adjusted R Square 0.015466 Standard Error 20.51556 Observations 25 ANOVA df SS MS F Significance F Regression 1 579.5726 579.5726 1.377023 0.252618 Residual 23 9680.427 420.8881 Total 24 10260 Coefficients Standard Error t Stat P-value Lower 95% Upper 95% Lower 95.0% Upper 95.0%Intercept 63.68956 6.886156 9.248928 3.27E-09 49.44446 77.93465 49.44446 77.93465Absences -1.72595 1.47081 -1.17347 0.252618 -4.76855 1.316657 -4.76855 1.316657QUESTION 4For the following output, write a paragraph (3-4 sentences) discussing the result. Your paragraph should indicate:What test was usedWhat the test measuresWhether the test is significantWhat the result/decision was in terms of the variables and if any additional testing is necessary.Report the statistics in APA format. Observed Values Expected Values Attended Did Not Attend Sum Attended Did Not AttendJoined 10 12 22 Joined 6.695652 15.30435Did Not Join 4 20 24 Did Not Join 7.304348 16.69565 14 32 46 Observed Expected (O-E)2 (O-E)2 /E Joined and Attended 10 6.695652174 10.91871 1.630717 Did Not Join and Did Not Attend 12 15.30434783 10.91871 0.713439 Joined and Attended 4 7.304347826 10.91871 1.494824 Did Not Join and Did Not Attend 20 16.69565217 10.91871 0.653986 X2 4.492965 P Value 0.034035 QUESTION 5A principal wanted to know if the location of testing affected student performance on a statewide standardized test. He collected the following data:Control 60 degrees Classical Music Next to Cafeteria31 53 27 2916 39 36 1811 71 32 1619 39 14 2043 54 40 749 41 60 124 9 47 2011 17 2 4534 13 27 3339 8 5 5360 32 55 2340 29 53 2457 35 27 1859 45 4 4943 42 50 29A complete answer should:Indicate which test should be used.State hypothesesReport if the test was significant and what decision is madeProvide a conclusion sentence and the statistics in APA format.QUESTION 6For the following output, write a paragraph (3-4 sentences) discussing the result. Your paragraph should indicate:What test was usedWhat the test measuresWhether the test is significantWhat the result/decision was in terms of the variables and if any additional testing is necessary.Report the statistics in APA format.Make a statement of conclusion about what a researcher would learn from this result.SUMMARY Groups Count Sum Average Variance Group 1 25 1467 58.68 253.2267 Group 2 25 1525 61 628.75 Group 3 25 1592 63.68 403.2267 Source of Variation SS df MS F P-value F critBetween Groups 7698.107 2 3849.053 8.984695 0.000329 3.123907Within Groups 30844.88 72 428.4011 Total 38542.99 74 QUESTION 7Given the data below, does the number of minutes spent exercises affect the number of glasses of water a person consumes?Glasses of Water Minutes1 501 271 252 672 252 503 803 333 153 763 383 413 224 844 674 694 814 55A complete answer should:Indicate which test she should use.Report if the test was significant and what decision is madeProvide a conclusion sentence and the statistics in APA format.QUESTION 8For the following output, write a paragraph (3-4 sentences) discussing the result. Your paragraph should indicate:What test was usedWhat the test measuresWhether the test is significantWhat the result/decision was in terms of the variables and if any additional testing is necessary.Report the statistics in APA format.Make a statement of conclusion about what a researcher would learn from this result. (You may create what causes the differences in groups such as: location, worksheets, demographics, etc.)Two-Sample Assuming Unequal Variances Group 1 Group 2Mean 61.90909 49.64Variance 341.5152 472.9067Observations 22 25Hypothesized Mean Difference 0 df 45 t Stat 2.090657 P(T<=t) one-tail 0.021119 t Critical one-tail 1.679427 P(T<=t) two-tail 0.042237 t Critical two-tail 2.014103 QUESTION 9For the following output, write a paragraph (3-4 sentences) discussing the result. Your paragraph should indicate:What test was usedWhat the test measuresWhether the test is significantWhat the result/decision was in terms of the variables and if any additional testing is necessary.Report the statistics in APA format.Make a statement of conclusion about what a researcher would learn from this result. (You may create what causes the differences in groups such as: location, worksheets, demographics, etc.)t-Test: Paired Two Sample for Means Group 1 Group 2Mean 67 84.38461538Variance 423.1666667 209.4230769Observations 13 13Pearson Correlation 0.129328052 Hypothesized Mean Difference 0 df 12 t Stat -2.659252971 P(T<=t) one-tail 0.010410066 t Critical one-tail 1.782287556 P(T<=t) two-tail 0.020820131 t Critical two-tail 2.17881283
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Most Popular Content
6 pages
Unit 8 Project
Find the next five terms of the arithmetic sequence 42, 37, 32, ... . Find the 24th term of an arithmetic sequence for whi ...
Unit 8 Project
Find the next five terms of the arithmetic sequence 42, 37, 32, ... . Find the 24th term of an arithmetic sequence for which a1 = 2 and d = 6.
1 page
Hmwk 19 Ch 26 27 Mod 1
CT 107 Hmwk #19 Answer Coversheet -Show your work by attaching your homework. Therefore, a thin object that is 6ft (72in) ...
Hmwk 19 Ch 26 27 Mod 1
CT 107 Hmwk #19 Answer Coversheet -Show your work by attaching your homework. Therefore, a thin object that is 6ft (72in) long can fit diagonally in ...
MTH 154 Northern Virginia Community College Quantitative Reasoning Word Problem Paper
Instructions: Work problems on a separate sheet of paper and attach work to this page. You shouldshow all work. Questions ...
MTH 154 Northern Virginia Community College Quantitative Reasoning Word Problem Paper
Instructions: Work problems on a separate sheet of paper and attach work to this page. You shouldshow all work. Questions with compact answers can be recordeddirectly on this page. Graphs and longer answers that won’t fit here, indicate which page of the workthe answer can be found on and be sure to clearly indicate it on the attached pages. You may use Excelto complete the problems, but then submit Excel files online.1. A newspaper article on drunk driving cited data on traffic deaths in Rhode Island: “Forty-twopercent of all fatalities occurred on Friday, Saturday and Sunday, apparently because ofincreased drinking on the weekends.” What percent of the week do Friday, Saturday andSunday represent? Are you surprised that 42% of fatalities occur on those days? How mightdata for the number of cars on the road on those days possibly change or reinforce thatperception?2. An article in a Midwestern newspaper about flight delays at a major airport said: ‘According to aGannet News Service study of US airline’s performance during the past five months, Chicago’sO’Hare Field scheduled 114,370 flights. Nearly 10%, 1,136 were canceled.’ Check the paper’sarithmetic. What percent of scheduled flights were actually cancelled?3. The number of Americans living below the poverty line increased from 24,975,000 to 43,569,000in the 34 years between 1976 and 2009. What percentage increase was this? You should notconclude from this that poverty grew more common in the US during these years. Why not?4. Do a search for ‘dubious statistics’ on the web. Select one of the articles. Describe the dubioususe of statistics in the cited research. What makes the use of stats dubious in the case youchose?5. Go to the website http://www.census.gov/ and select a statistic they measure to analyze. It’spreferable to choose something that changes over time. Choose two data points and describethe percentage change between them. Be sure to clearly state that statistics you are using andthe dates associated with them.6. Create a pie chart for the following data. Copy the data into Excel and create a summary tableto start. A sample of 20 students who had recently taken elementary statistics yielded thefollowing information on the brand of calculator owned (T=Texas Instrument, H=HewlettPackard, C=Casio, S=Sharp). Be sure that your graph is properly labeled, displays the percentsand has a title.T T H T C T T S C HS S T H C T T T H T7. Below are a series of graphs. Interpret the graph. For time series graphs compare informationfrom two points in time and say something about the information obtained from the graph. Isthere a better way of displaying the data that might make the comparison you choose moresalient? Explain what kind of graph you are looking at. If this qualifies as a ‘bad graph’ what isbad about it?a)b)c)d)e)f)g)h)8. Using the Excel file 154data2.xlsx to answer the questions below:a. Create a comparative Bar Graph of States of Birth for American Presidents, and a separateone for the state they represented at the time they were elected. Write a paragraphsummarizing the graphs.b. Use the data on the Favorite Day to Eat Out to create a pie or donut graph of the data. Besure it is properly labeled and is easy to understand. Write a sentence or two thatsummarizes the result.c. Use the data on percent of poverty on the third sheet to create a line graph of the data.d. Use the same data to calculate the percent change from year to year. Then make a linegraph of the resulting data. Note: Percent change should be signed, so that an increase willbe positive, and a decrease will be negative. Make sure your line graphs have axis labels, atitle and are easy to read.
NorthWest Arkansas Community College Regression Statistics Exam Practice
QUESTION 1Given the data below, a researcher would like to know whether someone's age group affects their choice of toilet ...
NorthWest Arkansas Community College Regression Statistics Exam Practice
QUESTION 1Given the data below, a researcher would like to know whether someone's age group affects their choice of toilet paper brand. Observed Brand A Brand B Brand C SumTeen 120 130 110 360Mid-Age 77 127 140 344Senior 84 100 98 282 281 357 348 986A complete answer should:Indicate which test she should use.State hypothesesReport if the test was significant and what decision is madeRun any necessary post-hoc analysis (and paste the result in the answer)Provide a conclusion sentence and the statistics in APA format.QUESTION 2A tutor measures her students with a 5 point algorithm, and she would like to know if her 6 students improved this month.Student Day 1 Day 30A 2.4 3.0B 2.5 2.8C 3.0 2.9D 2.9 2.4E 2.7 3.5F 2.1 2.9A complete answer should:Indicate which test she should use.State hypothesesReport if the test was significant and what decision is madeProvide a conclusion sentence and the statistics in APA format.QUESTION 3:For the following output, write a paragraph (3-4 sentences) discussing the result. Your paragraph should indicate:What test was usedWhat the test measuresWhether the test is significantWhat the result/decision was in terms of the variables and if any additional testing is necessary.Report the statistics in APA format.Make a statement of conclusion about what a researcher would learn from this result. (You may create what causes the differences in groups such as: location, worksheets, demographics, etc.)SUMMARY OUTPUT Regression Statistics Multiple R 0.237673 R Square 0.056489 Adjusted R Square 0.015466 Standard Error 20.51556 Observations 25 ANOVA df SS MS F Significance F Regression 1 579.5726 579.5726 1.377023 0.252618 Residual 23 9680.427 420.8881 Total 24 10260 Coefficients Standard Error t Stat P-value Lower 95% Upper 95% Lower 95.0% Upper 95.0%Intercept 63.68956 6.886156 9.248928 3.27E-09 49.44446 77.93465 49.44446 77.93465Absences -1.72595 1.47081 -1.17347 0.252618 -4.76855 1.316657 -4.76855 1.316657QUESTION 4For the following output, write a paragraph (3-4 sentences) discussing the result. Your paragraph should indicate:What test was usedWhat the test measuresWhether the test is significantWhat the result/decision was in terms of the variables and if any additional testing is necessary.Report the statistics in APA format. Observed Values Expected Values Attended Did Not Attend Sum Attended Did Not AttendJoined 10 12 22 Joined 6.695652 15.30435Did Not Join 4 20 24 Did Not Join 7.304348 16.69565 14 32 46 Observed Expected (O-E)2 (O-E)2 /E Joined and Attended 10 6.695652174 10.91871 1.630717 Did Not Join and Did Not Attend 12 15.30434783 10.91871 0.713439 Joined and Attended 4 7.304347826 10.91871 1.494824 Did Not Join and Did Not Attend 20 16.69565217 10.91871 0.653986 X2 4.492965 P Value 0.034035 QUESTION 5A principal wanted to know if the location of testing affected student performance on a statewide standardized test. He collected the following data:Control 60 degrees Classical Music Next to Cafeteria31 53 27 2916 39 36 1811 71 32 1619 39 14 2043 54 40 749 41 60 124 9 47 2011 17 2 4534 13 27 3339 8 5 5360 32 55 2340 29 53 2457 35 27 1859 45 4 4943 42 50 29A complete answer should:Indicate which test should be used.State hypothesesReport if the test was significant and what decision is madeProvide a conclusion sentence and the statistics in APA format.QUESTION 6For the following output, write a paragraph (3-4 sentences) discussing the result. Your paragraph should indicate:What test was usedWhat the test measuresWhether the test is significantWhat the result/decision was in terms of the variables and if any additional testing is necessary.Report the statistics in APA format.Make a statement of conclusion about what a researcher would learn from this result.SUMMARY Groups Count Sum Average Variance Group 1 25 1467 58.68 253.2267 Group 2 25 1525 61 628.75 Group 3 25 1592 63.68 403.2267 Source of Variation SS df MS F P-value F critBetween Groups 7698.107 2 3849.053 8.984695 0.000329 3.123907Within Groups 30844.88 72 428.4011 Total 38542.99 74 QUESTION 7Given the data below, does the number of minutes spent exercises affect the number of glasses of water a person consumes?Glasses of Water Minutes1 501 271 252 672 252 503 803 333 153 763 383 413 224 844 674 694 814 55A complete answer should:Indicate which test she should use.Report if the test was significant and what decision is madeProvide a conclusion sentence and the statistics in APA format.QUESTION 8For the following output, write a paragraph (3-4 sentences) discussing the result. Your paragraph should indicate:What test was usedWhat the test measuresWhether the test is significantWhat the result/decision was in terms of the variables and if any additional testing is necessary.Report the statistics in APA format.Make a statement of conclusion about what a researcher would learn from this result. (You may create what causes the differences in groups such as: location, worksheets, demographics, etc.)Two-Sample Assuming Unequal Variances Group 1 Group 2Mean 61.90909 49.64Variance 341.5152 472.9067Observations 22 25Hypothesized Mean Difference 0 df 45 t Stat 2.090657 P(T<=t) one-tail 0.021119 t Critical one-tail 1.679427 P(T<=t) two-tail 0.042237 t Critical two-tail 2.014103 QUESTION 9For the following output, write a paragraph (3-4 sentences) discussing the result. Your paragraph should indicate:What test was usedWhat the test measuresWhether the test is significantWhat the result/decision was in terms of the variables and if any additional testing is necessary.Report the statistics in APA format.Make a statement of conclusion about what a researcher would learn from this result. (You may create what causes the differences in groups such as: location, worksheets, demographics, etc.)t-Test: Paired Two Sample for Means Group 1 Group 2Mean 67 84.38461538Variance 423.1666667 209.4230769Observations 13 13Pearson Correlation 0.129328052 Hypothesized Mean Difference 0 df 12 t Stat -2.659252971 P(T<=t) one-tail 0.010410066 t Critical one-tail 1.782287556 P(T<=t) two-tail 0.020820131 t Critical two-tail 2.17881283
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