(a) The authors of this paper used a two-sample t test to test H0: ?1 - ?2 = 0 versus Ha: ?1 - ?2 ≠ 0. What assumptions must be reasonable in order for this to be an appropriate method of analysis? We must assume that the population distributions ---Select--- are aren't approximately normal. (b) The paper indicates that the null hypothesis from Part (a) was rejected and reports that the P-value is less than .05. Carry out the two-sample t test. Is your conclusion consistent with that of the paper? YesNo
(a) The authors of this paper used a two-sample t test to test H0: ?1 - ?2 = 0 versus Ha: ?1 - ?2 ≠ 0. What assumptions must be reasonable in order for this to be an appropriate method of analysis? We must assume that the population distributions ---Select--- are aren't approximately normal. (b) The paper indicates that the null hypothesis from Part (a) was rejected and reports that the P-value is less than .05. Carry out the two-sample t test. Is your conclusion consistent with that of the paper? YesNo
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 9PPS
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Reduced heart rate variability (HRV) is known to be a predictor of mortality after a heart attack. One measure of HRV is the average of normal-to-normal beat interval (in milliseconds) for a 24-hour time period. Twenty-two heart attack patients who were dog owners and 80 heart attack patients who did not own a dog participated in a study of the effect of pet ownership on HRV, resulting in the summary statistics shown in the accompanying table.
| Measure of HRV (average normal-to-normal beat interval) |
| Mean | Standard Deviation |
|
| Owns Dog | 874 | 136 |
| Does Not Own Dog | 801 | 133 |
(a) The authors of this paper used a two-sample t test to test H0: ?1 - ?2 = 0 versus Ha: ?1 - ?2 ≠ 0. What assumptions must be reasonable in order for this to be an appropriate method of analysis?
We must assume that the population distributions ---Select--- are aren't approximately normal.
(b) The paper indicates that the null hypothesis from Part (a) was rejected and reports that the P-value is less than .05. Carry out the two-sample t test. Is your conclusion consistent with that of the paper?
We must assume that the population distributions ---Select--- are aren't approximately normal.
(b) The paper indicates that the null hypothesis from Part (a) was rejected and reports that the P-value is less than .05. Carry out the two-sample t test. Is your conclusion consistent with that of the paper?
YesNo
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