Please answer the following three multiple choice questions :) Summarized below are data for a study to see if hours of sleep per day for med and non-med students are the same: n x¯ s med students 25 5.8 0.83 non-med students 32 6.3 1.39 1. Find the test statistic (assume unequal standard deviation) A. -15.44 B. -5.69 C. -1.69 D. -1.81 2. Let tstat represent the value of the test statistic from the previous question. The degrees of freedom for the test are df = 52. To test the claim that the mean hours of sleep for med and non-med students is different, the P-value is calculated as: A. 2*pt( tstat, df=52, lower.tail = TRUE) B. 2*pt( tstat, df=52, lower.tail = FALSE) C. pt( tstat, df=52, lower.tail = TRUE) D. pt( tstat, df=52, lower.tail = FALSE) 3. The correct P-value is 0.098. At α = 0.05, we A. reject H0. The claim that means are different is not supported. B. reject H0. The claim that means are different is supported. C. fail to reject H0. The claim that means are different is not supported. D. fail to reject H0. The claim that means are different is supported.
Please answer the following three multiple choice questions :)
Summarized below are data for a study to see if hours of sleep per day for med and non-med students are the same:
| n |
|
s | ||||
| med students | 25 | 5.8 | 0.83 | |||
| non-med students | 32 | 6.3 | 1.39 |
1. Find the test statistic (assume unequal standard deviation)
A. -15.44
B. -5.69
C. -1.69
D. -1.81
2. Let tstat represent the value of the test statistic from the previous question. The degrees of freedom for the test are df = 52. To test the claim that the mean hours of sleep for med and non-med students is different, the P-value is calculated as:
A. 2*pt( tstat, df=52, lower.tail = TRUE)
B. 2*pt( tstat, df=52, lower.tail = FALSE)
C. pt( tstat, df=52, lower.tail = TRUE)
D. pt( tstat, df=52, lower.tail = FALSE)
3. The correct P-value is 0.098. At α = 0.05, we
A. reject H0. The claim that means are different is not supported.
B. reject H0. The claim that means are different is supported.
C. fail to reject H0. The claim that means are different is not supported.
D. fail to reject H0. The claim that means are different is supported.
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