Questions 14 through 20: It is believed that regular physical exercise leads to a lower resting pulse rate. Following ar

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Questions 14 Through 20 It Is Believed That Regular Physical Exercise Leads To A Lower Resting Pulse Rate Following Ar 1 (53.76 KiB) Viewed 98 times

Questions 14 Through 20 It Is Believed That Regular Physical Exercise Leads To A Lower Resting Pulse Rate Following Ar 2 (61.34 KiB) Viewed 98 times

Questions 14 through 20: It is believed that regular physical exercise leads to a lower resting pulse rate. Following are summary data for individuals resting pulse rate for the two groups of whether the individual regularly exercises or not (sample 1 is No; sample 2 is Yes). Exercise n Mean St Dev SE Mean No 8 72.00 9.13 3.20 Yes 12 65.33 7.49 2.20 Assuming this is a random sample from a larger population and resting pulse rate is normally distributed, use this data to determine whether the mean pulse rate is lower for those who exercise. Page 2 of 3 What do we know? S1 n- S2 n2 = x x a= 0.05 Step 2: Determine the null and alternative hypotheses. Is the research question two-sided or one-sided? If one sided, is it for above or below 0? 14. He: 15. Ho:

16. Calculate the unpooled standard error of the sampling distribution of the sample mean difference Sa-) + n, (use 3 decimal places) Steps 3.C. & 4.B.: Use the calculator to obtain the test statistic and its P-value. 17. t = 18. P-value = (use 2 decimal places) (use 4 decimal places) Steps 4.C. & 5: Statistical Decision & Interpretation 19. On the basis of the P-value which of the following is the correct statistical decision regarding the null hypothesis? a. Reject the null hypothesis because the P-value is sa b. Fail to reject the null hypothesis because the P-value is a c. Reject the null hypothesis because the P-value is 2 a d. Fail to reject the null hypothesis because the P-value is <a 20. Which of the following is the correct interpretation of the hypothesis test? a. Based on the samples, there is insufficient evidence to conclude that there is a difference in the mean pulse rate for those who regularly exercise and those who do not b. Based on the samples, we can conclude that on average the pulse rate for those who regularly exercise is significantly lower than the pulse rate for those who do not regularly exercise. . Based on the samples, we can conclude that on average the pulse rate for those who regularly exercise is significantly higher than the pulse rate for those who do not regularly exercise. а C. Page 3 of 3