Module 4 Quiz_ ALY6010 70485 Prob Theory and Intro Stats SEC 07 Fall 2023 CPS [SJO-B-HY]

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2/21/24, 9:59 PM Module 4 Quiz: ALY6010 70485 Prob Theory and Intro Stats SEC 07 Fall 2023 CPS [SJO-B-HY] https://northeastern.instructure.com/courses/160588/quizzes/552258 1/4 Due No due date Points 50 Questions 5 Time Limit None Instructions Attempt History Attempt Time Score LATEST Attempt 1 11 minutes 50 out of 50 Score for this quiz: 50 out of 50 Submitted Nov 27, 2023 at 3:41pm This attempt took 11 minutes.  Do not leave the test before clicking Save and Submit. Module 4 Quiz  Syllabus (https://northeastern.instructure.com/courses/160588/assignments/syllab  Modules (https://northeastern.instructure.com/courses/160588/modules)  Optional Resources (https://northeastern.instructure.com/courses/160588/pages/o  Assignments (https://northeastern.instructure.com/courses/160588/assignments)            

2/21/24, 9:59 PM Module 4 Quiz: ALY6010 70485 Prob Theory and Intro Stats SEC 07 Fall 2023 CPS [SJO-B-HY] https://northeastern.instructure.com/courses/160588/quizzes/552258 2/4 Question 1 10 / 10 pts Test value: z = -1.49 There is not enough evidence to reject the claim that the average prices in the two stores are equal. Hence, there is not a significant difference in the average prices. Test value: z = -2.94 There is not enough evidence to reject the claim that the average prices in the two stores are equal. Hence, there is not a significant difference in the average prices. Test value: z = -1.49 There is enough evidence to reject the claim that the average prices in the two stores are equal. Hence, there is a significant difference in the average prices. Correct! Test value: z = -2.94 There is enough evidence to reject the claim that the average prices in the two stores are equal. Hence, there is a significant difference in the average prices.  Question 2 10 / 10 pts Joan has just moved into a new apartment and wants to purchase a new couch. To determine if there is a difference between the average prices of couches at two different stores, she collects the following data. Compute the testvalue and test the hypothesis that there is no difference in the average price. Use alpha = 0.05.

2/21/24, 9:59 PM Module 4 Quiz: ALY6010 70485 Prob Theory and Intro Stats SEC 07 Fall 2023 CPS [SJO-B-HY] https://northeastern.instructure.com/courses/160588/quizzes/552258 3/4 Since the P-value is less than 0.05, do not reject the null hypothesis. There is not enough evidence to support the claim that there is a difference in the scores. Since the P-value is greater than 0.05, reject the null hypothesis. There is enough evidence to support the claim that there is a difference in the scores. Since the P-value is less than 0.05, reject the null hypothesis. There is enough evidence to support the claim that there is a difference in the scores. Correct! Since the P-value is greater than 0.05, do not reject the null hypothesis. There is not enough evidence to support the claim that there is a difference in the scores.  Question 3 10 / 10 pts -2.993 -1.61 -0.498 Correct! -1.113  A large group of friends went miniature golfing together at a par 54 course and decided to play on two teams. A random sample of scores from each of the two teams is shown. At alpha = 0.05, is there a difference in mean scores between the two teams? Use the P- value method. Team 1 58 46 53 50 55 63 63 52 Team 2 59 43 43 55 50 55 48 Following is a sample of five matched pairs. Let μ and μ represent the population means and let A test will be made of the hypotheses versus Compute the test statistic. 1 2

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2/21/24, 9:59 PM Module 4 Quiz: ALY6010 70485 Prob Theory and Intro Stats SEC 07 Fall 2023 CPS [SJO-B-HY] https://northeastern.instructure.com/courses/160588/quizzes/552258 4/4 Question 4 10 / 10 pts -0.029 < p1 - p2 < 0.289 -0.037 < p1 - p2 < 0.377 Correct! -0.022 < p1 - p2 < 0.222 -0.013 < p1 - p2 < 0.133  Question 5 10 / 10 pts False Correct! True Quiz Score: 50 out of 50 A survey found that 78% of the men questioned preferred computer-assisted instruction to lecture and 68% of the women preferred computer-assisted instruction to lecture. There were 100 randomly selected individuals in each sample. Find the 95% confidence interval for the difference of the two proportions. In the F distribution, values of F cannot be negative, because variances are always positive or zero.

Module 4 Quiz_ ALY6010 70485 Prob Theory and Intro Stats SEC 07 Fall 2023 CPS [SJO-B-HY]

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