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The information is for the following 5 questions. Conduct the following test at the α=0.01 level...
A professor wanted to determine whether an online homework system improved scores on a final exam....
A professor wanted to determine whether an online homework system improved scores on a final exam. In the fall semester, he taught a class using the online homework system (which meant students did their homework online and received instant feedback about their answers along with helpful guidance). I spring semester, he taught a class without the homework system (which meant students were responsible for doing their homework the old-fashioned way - paper and pencil). The professor made sure to teach...
A liberal arts college in New Hampshire implemented an online homework system for their introductory math...
A liberal arts college in New Hampshire implemented an online homework system for their introductory math courses and wanted to know whether or not the system improved test scores. In the Fall semester, homework was completed the old fashioned way – with pencil and paper, checking answers in the back of the book. In the Spring semester, homework was completed online – giving students instant feedback on their work. The results are summarized below. Population standard deviations were used from...
You wish to test the following claim (Ha) at a significance level of α=0.01. Ho:μ=73.2...
You wish to test the following claim (Ha) at a significance level of α=0.01. Ho:μ=73.2 Ha:μ<73.2 You believe the population is normally distributed, but you do not know the standard deviation. You obtain the following sample of data: Column A Column B Column C Column D Column E 71.3 63.5 54.4 82.2 69.3 64.4 69.7 50.8 63.5 73.8 93.5 55 74.6 83.3 71.3 80.1 56.2 61.7 48.1 55 89.5 73.4 65.6 89.5 61.3 41.5 94.8 76.4 68.1 75.9...
You wish to test the following claim (HaHa) at a significance level of α=0.01α=0.01. For the...
You wish to test the following claim (HaHa) at a significance level of α=0.01α=0.01. For the context of this problem, μd=μ2−μ1μd=μ2-μ1 where the first data set represents a pre-test and the second data set represents a post-test. Ho:μd=0 Ha:μd<0 You believe the population of difference scores is normally distributed, but you do not know the standard deviation. You obtain pre-test and post-test samples for n=48n=48 subjects. The average difference (post - pre) is ¯d=−20.2d¯=-20.2 with a standard deviation of the...
Question 1 0 out of 0.05 points The information is for the following 2 questions. Conduct a test ...
Question 1 0 out of 0.05 points The information is for the following 2 questions. Conduct a test and find if the paired variables X are different from the Y at the a 0.05 level bservation 1 Xi 794.5 789.6 793.5 790.1 794.3 791.5 793.2 792.5 794.1 792.4 790.5 797 1. Find s-? Question 2 0 out of 0.05 points The upper boundary of the 95% confidence interval of the difference is Question 3 0 out of 0.05 points The...
You wish to test the following claim (HaHa) at a significance level of α=0.01α=0.01. For the...
You wish to test the following claim (HaHa) at a significance level of α=0.01α=0.01. For the context of this problem, μd=μ2−μ1μd=μ2-μ1 where the first data set represents a pre-test and the second data set represents a post-test. Ho:μd=0Ho:μd=0 Ha:μd≠0Ha:μd≠0 You believe the population of difference scores is normally distributed, but you do not know the standard deviation. You obtain pre-test and post-test samples for n=19n=19 subjects. The average difference (post - pre) is ¯d=−9.5d¯=-9.5 with a standard deviation of the...
7/23/2020 Chapter 11 Homework-Lisa Jordan 6. Conduct the following test at the a= 0.01 level of...
7/23/2020 Chapter 11 Homework-Lisa Jordan 6. Conduct the following test at the a= 0.01 level of significance by determining (a) the null and alternative hypotheses, (b) the test statistic, and (c) the critical value. Assume that the samples were obtained independently using simple random sampling Test whether p1 # P2. Sample data are x1 = 30, n = 254, X2 = 38 and n2 = 302. (a) Determine the null and alternative hypotheses. Choose the correct answer below. Ho: P1...
You wish to test the following claim (Ha) at a significance level of α=0.01α=0.01. For the...
You wish to test the following claim (Ha) at a significance level of α=0.01α=0.01. For the context of this problem, d=x2−x1 where the first data set represents a pre-test and the second data set represents a post-test. Ho:μd=0 Ha:μd<0 You believe the population of difference scores is normally distributed, but you do not know the standard deviation. You obtain pre-test and post-test samples for n=9 subjects. The average difference (post - pre) is ¯d= −65.7 with a standard deviation of...
Complete the following four hypotheses, using α = 0.05 for each. The week 5 spreadsheet can...
Complete the following four hypotheses, using α = 0.05 for each. The week 5 spreadsheet can be used in these analyses. 1. Mean sales per week exceed 42.5 per salesperson 2. Proportion receiving online training is less than 55% 3 Mean calls made among those with no training is at least 145 4. Mean time per call is 14.7 minutes Using the same data set from part A, perform the hypothesis test for each speculation in order to see if...
Periodically, Merrill Lynch customers are asked to evaluate Merill Lynch financial consultants and services. Higher ratings...
Periodically, Merrill Lynch customers are asked to evaluate Merill Lynch financial consultants and services. Higher ratings on the client satisfactian survey indicate better service with 7 the maximum service rating. Independent samples of service ratings for two financial consultants are summarized here. Consultant A has 10 years of experience, whereas consultant B has 1 year of experience. Use a 05 and test to see whether the consaltant with more experience has the higher population mean service rating Excel File: data10-17.xs...
A professor wanted to determine whether an online homework system improved scores on a final exam. In the fall semester, he taught a class using the online homework system (which meant students did their homework online and received instant feedback about their answers along with helpful guidance). I spring semester, he taught a class without the homework system (which meant students were responsible for doing their homework the old-fashioned way - paper and pencil). The professor made sure to teach...
Question 1 0 out of 0.05 points The information is for the following 2 questions. Conduct a test and find if the paired variables X are different from the Y at the a 0.05 level bservation 1 Xi 794.5 789.6 793.5 790.1 794.3 791.5 793.2 792.5 794.1 792.4 790.5 797 1. Find s-? Question 2 0 out of 0.05 points The upper boundary of the 95% confidence interval of the difference is Question 3 0 out of 0.05 points The...
7/23/2020 Chapter 11 Homework-Lisa Jordan 6. Conduct the following test at the a= 0.01 level of significance by determining (a) the null and alternative hypotheses, (b) the test statistic, and (c) the critical value. Assume that the samples were obtained independently using simple random sampling Test whether p1 # P2. Sample data are x1 = 30, n = 254, X2 = 38 and n2 = 302. (a) Determine the null and alternative hypotheses. Choose the correct answer below. Ho: P1...
Periodically, Merrill Lynch customers are asked to evaluate Merill Lynch financial consultants and services. Higher ratings on the client satisfactian survey indicate better service with 7 the maximum service rating. Independent samples of service ratings for two financial consultants are summarized here. Consultant A has 10 years of experience, whereas consultant B has 1 year of experience. Use a 05 and test to see whether the consaltant with more experience has the higher population mean service rating Excel File: data10-17.xs...
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