Final Exam Winter 2022 - Google Chrome X mylab.pearson.com/Student/PlayerTest.aspx?testld=241544758¢erwin=yes Statistics for Analytics II Spring/Summer 2022B Neda Rostami 08/17/22 6:34 PM =Test: Final Exam Winter 2022 Question 21 of 30 This test: 30 point(s) possible This question: 1 point(s) possible Submit test At a major credit card bank, the percentages of people who historically apply for the Silver, Gold and Platinum cards are 60%, 30% and 10% respectively. In a recent sample of customers responding to a promotion, of 200 customers, 104 applied for Silver, 68 for Gold and 28 for Question list K Platinum. Is there evidence to suggest that the percentages for this promotion may be different from the historical proportions? Complete parts a through e below. Question 19 a) If the customers apply for the three cards according to the historical proportions, about how big, on average, would you expect the y statistic to be (what is the mean of the x- distribution)? The expected x- statistic is . (Type an integer or a decimal.) O Question 20 b) The computed y statistic for the given data is 6.40. Does this seem large in comparison to the mean in part a? Explain briefly. because the statistic is the mean. O Question 21 Determine the null and alternative hypotheses. Choose the correct answer below. Question 22 O A. Ho: These customers are applying for cards in the traditional proportions HA: All the card proportions are different from their traditional proportions. O B. Ho: These customers are not applying for cards in the traditional proportions. Question 23 HA: These customers are applying for cards in the traditional proportions. O C. Ho: These customers are applying for cards in the traditional proportions HA: These customers are not applying for cards in the traditional proportions. Question 24 c) What does the comparison in part b say about the null hypothesis? Question 25 Since the test statistic is the mean, so the null hypothesis and conclude that these customers applying for cards in the traditional proportions. d) Find the o= 0.05 critical value for the y distribution with the appropriate number of df. Question 26 2 =(Round to two decimal places as needed.) e) Using the critical value, what do you conclude about the null hypothesis at a = 0.05? Question 27 The test statistic is the critical value, so the null hypothesis. There is V evidence that the proportions of customers applying for the new cards are different from the traditional proportions. O Question 28 O Question 29 Activate Windows Go to Settings to activate Windows. Time Remaining: 02:26:54 Next Type here to search O X 25.C Mostly cloudy ~ 9 4 () ENG 6:31 PM 994 2022-08-17