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Mathematics, 20.04.2020 23:54 biancasamadp3usfw
The dean at a large university in California wonders if students study less than the 1961 national average of 24 hours per week. She randomly selects 25 students and asks their average study time per week (in hours). From their responses, she calculates a sample mean of 19 hours and a sample standard deviation of 10 hours. Assume the study times are normally distributed.
1. Specify the null and alternative hypotheses.
Select one:
a. H(0): μ≤24 Versus H(a): μ>24
b. H(0): μ≥24 Versus H(a): μ<24
2. The standard error (SE) of X¯X¯ is
Select one:
a. 2
b. 0.4
c. 10
d. 3.8
3. The test statistics value is
Select one:
a. -1.25
b. -1.67
c. -2.5
d. -2
4. The p-value is
Select one:
a. 0.11
b. 0.05
c. 0.01
d. 0.03
5. At α=0.05 and based on p-value
Select one:
a. We reject H(0) in favor of H(a)
b. We do not reject H(0)
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Answers: 2
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