Reference no: EM133031879
Q1) Explain what is a p-value, and provide examples of how we interpret the p-value. Provide two comments to your classmates
Q2) In the following multiple choice questions, circle the letter in front of the correct answer
1. We test the hypotheses H0: μ = μ0 vs. Ha: μ ≠ μ0 based on SRS of size n from a normal population with unknown mean μ and known standard deviation σ. If we reject H0 when H0 is in fact true we commit a __________ error.
a. Type I
b. Type II
c. Level α
d. Type I error and Type II.
2. 20 randomly selected statistics students were given 15 multiple-choice questions and 15 open-ended questions - all on the same material. The professor was interested in determining which type of questions the students scored higher. This experiment is an example of
a) a one sample test of means.
b) a two sample test of means.
c) a paired t-test.
d) a test of proportions.
3. A recent study posed the question about whether Japanese managers are more motivated than American managers. A randomly selected sample of each was administered the Sarnoff Survey of Attitudes Toward Life (SSATL), which measures motivation for upward mobility. The SSATL scores are summarized below.
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American
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Japanese
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Sample Size
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211
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100
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Mean SSATL Score
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65.75
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79.83
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Population Std. Dev.
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11.07
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6.41
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Judging from the way the data were collected, which test would likely be most appropriate?
a. Related samples t-test for mean difference
b. Pooled-variance t-test for the difference in means
c. Independent samples Z-test for the difference in means
d. Related samples Z-test for mean difference
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