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The University College is interested in the average number of hours per week that freshmen spend...

The University College is interested in the average number of hours per week that freshmen spend going to parties. They took a random sample of 300 freshmen and calculated a mean of 6 hours a week going to parties and a 95% confidence interval for the population mean to be 4 to 8 hours a week. Based on this information, what was their standard error of the mean?

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Answer #1

95% confidence interval for the population mean to be 4 to 8 hours a week

Mean = 6 hours

Sample size = n = 300

Margin of error = E = Upper confidence limit - mean = 8 - 6 = 2

Z_c at 95% CI = 1.96

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