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step was required to step up and down a 6-inch platform. The pulse of each subject was then recorded. The following results were obtained. (a) State the null and alternative hypotheses. Which of the following is correct? OA. H: ₁₂ H₂Hy

step was required to step up and down a 6-inch platform. The pulse of each subject was then recorded. The following results were obtained. (a) State the null and alternative hypotheses. Which of the following is correct? OA. H: ₁₂ H₂Hy

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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A physical therapist wanted to know whether the mean step pulse of men was less than the mean step pulse of women. She randomly selected 53 men and 72 women to participate in the study. Each subject was required to step up and down a 6-inch platform. The pulse of each subject was then recorded. The following results were obtained. (a) State the null and alternative hypotheses. Which of the following is correct? OA. Ho: H₁ H₂ Ha: H₁ <H₂ O B. Ho: H=Hzi Ha Hy Hy OC. Ho: H₁ H₂ H₂: H₁ H₂ (b) Identify the P-value and state the researcher's conclusion if the level of significance was a = 0.02. What is the P-value? P-value= State the researcher's conclusion. Which of the following is correct? O A. Fail to reject Ho, there is not sufficient evidence to conclude that the mean step pulse of men was less than the mean step pulse of women OB. Reject Ho, there is not sufficient evidence to conclude that the mean step pulse of men was less than the mean step pulse of women O C. Fail to reject Ho, there is sufficient evidence to conclude that the mean step pulse of men was less than the mean step pulse of women O D. Reject Ho, there is sufficient evidence to conclude that the mean step pulse of men was less than the mean step pulse of women (c) What is the 95% confidence interval for the mean difference in pulse rates of men versus women? The lower bound is The upper bound is (Round to two decimal places as needed.) Interpret this result. OA. 95% percent of the time the mean difference is in the confidence interval. O B. We are 95% confident that the means are in the confidence interval. O C. 95% percent of the time the means are in the confidence interval. O D. We are 95% confident that the mean difference is in the confidence interval. C Men Women 95% CI for mu Men-mu Women (-10.64, -1.36) T-Test mu Men=mu Women (vs<) T= -2.58 P=0.0056 DF = 122 N 53 72 Mean 112.4 118.4 Two sample T for Men vs Women StDev 11.5 14.5 SE Mean 1.6 1.7
Transcribed Image Text:A physical therapist wanted to know whether the mean step pulse of men was less than the mean step pulse of women. She randomly selected 53 men and 72 women to participate in the study. Each subject was required to step up and down a 6-inch platform. The pulse of each subject was then recorded. The following results were obtained. (a) State the null and alternative hypotheses. Which of the following is correct? OA. Ho: H₁ H₂ Ha: H₁ <H₂ O B. Ho: H=Hzi Ha Hy Hy OC. Ho: H₁ H₂ H₂: H₁ H₂ (b) Identify the P-value and state the researcher's conclusion if the level of significance was a = 0.02. What is the P-value? P-value= State the researcher's conclusion. Which of the following is correct? O A. Fail to reject Ho, there is not sufficient evidence to conclude that the mean step pulse of men was less than the mean step pulse of women OB. Reject Ho, there is not sufficient evidence to conclude that the mean step pulse of men was less than the mean step pulse of women O C. Fail to reject Ho, there is sufficient evidence to conclude that the mean step pulse of men was less than the mean step pulse of women O D. Reject Ho, there is sufficient evidence to conclude that the mean step pulse of men was less than the mean step pulse of women (c) What is the 95% confidence interval for the mean difference in pulse rates of men versus women? The lower bound is The upper bound is (Round to two decimal places as needed.) Interpret this result. OA. 95% percent of the time the mean difference is in the confidence interval. O B. We are 95% confident that the means are in the confidence interval. O C. 95% percent of the time the means are in the confidence interval. O D. We are 95% confident that the mean difference is in the confidence interval. C Men Women 95% CI for mu Men-mu Women (-10.64, -1.36) T-Test mu Men=mu Women (vs<) T= -2.58 P=0.0056 DF = 122 N 53 72 Mean 112.4 118.4 Two sample T for Men vs Women StDev 11.5 14.5 SE Mean 1.6 1.7
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