Question

Construct a 95% Z-interval or a 95% t-interval about the population mean. Assume the data come from a population that is approximately normal with no outliers. Fifteen randomly selected men were asked to run on a treadmill for 6 minutes. After the 6 minutes, their pulses were measured and the following data were obtained: 88 105 101 122 94 99 114 98 85 97 84 101 104 124 90 (94.2, 106.6); we are 95% confident that the mean pulse rate of men after 6 minutes of exercise is between 94.2 and 106.6 beats per minute. (94.9, 105.9); we are 95% confident that the mean pulse rate of men after 6 minutes of exercise is between 94.9 and 105.9 beats per minute. (93.7, 107.1); we are 95% confident that the mean pulse rate of men after 6 minutes of exercise is between 93.7 and 107.1 beats per minute. (95.2, 105.6); we are 95% confident that the mean pulse rate of men after 6 minutes of exercise is between 95.2 and 105.6 beats per minute.

Answer 1

sol. From the given data- n=15 X IX 1506 15 100.4 = h SD = ECx;-)? 19.1644 907116 14. m-1 95% confidence interval is Q-0.05, da nafa 14 it algo dt = 9.145 CI 7 ** x + t * S n 100.4+ 2.145 * 19.1644 JTE 100.4 + 6.7371 (93.6699 , 107.1371) 954. CI: (93.7, 107.1) option (C) is correct. c. ( 93.7, 207.1); we are got. confident that the mean pulse rate of after 6 minutes of exercise is between 93.7 and 107.1 beats per minute. men