Can anyone help with these please?

Test: Graded Homework Assignment Time Remaining: 01:56:47 Submit Test This Question: 9 pts 15 of 40 (2 complete) This Test: 178 pts possible On a television show, eight contestants try to lose the highest percentage of weight in order to win a cash prize. As part of the show, the contestants are timed as they run an obstacle course. The table shows the times (in seconds) of the contestants at the beginning of the season and at the end of the season. At a = 0.05, is there enough evidence to support the claim that the contestants' times have changed? Assume the samples are random and dependent, and the population is normally distributed. Complete parts (a) through (e) below. Contestant 3 4 5 6 8 2 Time (beginning) 105.9 152.2 126.5 124.4 127.9 141.5 125.5 147.3 Time (end) 99.5 148.5 121.7 121.8 115.1 139.1 114.7 131.1 (a) Identify the claim and state Ho and Ha. What is the claim? O A. The contestants' times have decreased. O B. The contestants' times have changed. O C. The contestants' times have increased. O D. The contestants' times have not changed. Let Ha be the hypothesized mean of the difference in the times (beginning - end). What are Ho and Ha? O A. Ho: Hasa OB. Ho: Hd 20 O C. Ho: Hd 2 d Ha : Ha > d Ha : Hd 0 Ha: Hd = 0 Ha: Hd # 0 (b) Find the critical value(s) and identify the rejection region(s). Select the correct choice below and fill in any answer boxes to complete your choice. (Round to three decimal places as needed.) O A. to O B. t O C. t> (c) Calculate d and sa a=(Round to three decimal places as needed.) Calculate Sa- Click to select your answer(s). ? Type here to search O ~ 95 () ENG 2:39 PM 2020-04-03Test: Graded Homework Assignment Time Remaining: 01:56:45 Submit Test This Question: 9 pts 1 15 of 40 (2 complete) This Test: 178 pts possible On a television show, eight contestants try to lose the highest percentage of weight in order to win a cash prize. As part of the show, the contestants are timed as they run an obstacle course. The table shows the times (in seconds) of the contestants at the beginning of the season and at the end of the season. At a = 0.05, is there enough evidence to support the claim that the contestants' times have changed? Assume the samples are random and dependent, and the population is normally distributed. Complete parts (a) through (e) below. Contestant 3 6 Time (beginning) 105.9 152.2 126.5 124.4 127.9 141.5 125.5 147.3 8 2 Time (end) 99.5 148.5 121.7 121.8 115.1 139.1 114.7 131.1 Let Ho be the hypothesized mean of the difference in the times (beginning - end). What are Ho and Ha? O A. Ho: Hasa O B. Ho: Hd 20 O C. Ho: Ho 2 d Ha Ha > d Ha: Hd 0 Ha: Hd = 0 Ha: Hd # 0 (b) Find the critical value(s) and identify the rejection region(s). Select the correct choice below and fill in any answer boxes to complete your choice. (Round to three decimal places as needed.) O A. to O B. t O C. > (c) Calculate d and sa a=(Round to three decimal places as needed.) Calculate Sd sa =(Round to three decimal places as needed.) (d) Find the standardized test statistic t. t= (Round to three decimal places as needed.) (e) Decide whether to reject or fail to reject the null hypothesis and interpret the decision in the context of the original claim. the null hypothesis. There V enough evidence to the claim that the contestants' times have Click to select your answer(s). Type here to search O () ENG 2:39 PM 2020-04-03