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**preview**shows half of the first page. to view the full**1 pages of the document.**Statistics Lab 2201 Name: ____________________________

Lab Assignment #3

Due: October 22, 2008

Directions: Using the GSS96small data set, answer the following questions.

1. Run an estimate of the standard error of the mean for the variable age.

a. What is the estimate of the standard error of the mean? ____________________

b. Why do we refer to this as an estimate rather than the true standard error?

2. Run a confidence interval for the variable occupational prestige (prestg80).

a. What is the estimate of the standard error of the mean? ____________________

b. Indicate where 95% of the cases will fall. From ______________ to ______________.

c. Based on the information presented in the output, without running another confidence

interval, explain how you could calculate a 99% confidence interval with the information

given. (Note: You DO NOT have to calculate the new confidence interval, just tell me

how you would do it.)

d. What is the standard error for the population based on the information you found above?

(Choose the best answer.)

1. It is the standard error of the mean presented in the output.

2. I can’t determine this.

3. My best estimate is the standard error of the mean presented in the output,

but I cannot know for sure.

e. What about this sample makes you more confident in your assumption that the results

produced here are close to that of the population?

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