As part of a study on the dietary habits of male zombies. Professor Rick Grimes
ID: 3129657 • Letter: A
Question
As part of a study on the dietary habits of male zombies. Professor Rick Grimes weighed a sample of 65 male zombies between the ages of 55 and 75. He found their average (mean) weight was 180 pounds with a standard deviation of 12 pounds. Dr. Rick Grimes wants to generalize his findings to the population of all male zombies. For this study, what is the standard error of the mean (S_x) for the 95% confidence level? (Use the format X. XX to express your answer. Round to 2 decimal places) 1.49 For the problem above, what are the degrees of freedom for the 95% confidence interval? Give your answer to the nearest whole number. For the problem above (question #6), what is the critical value for "I" at the 95% confidence level?Explanation / Answer
6.
SE = sigma/sqrt(n) = 12/sqrt(65) = 1.488416 = 1.49 [ANSWER]
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7.
df = n - 1 = 65 - 1 = 64 [ANSWER]
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8.
As df = 64, alpha/2 = (1-0.95)/2 = 0.025, by table/technology,
tcrit = 1.997729654 [ANSWER]
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