Question

A random sample of 212 Canadian Internet users reveals that they visited an average of 1,576 web pages per month.
a. Assume the standard deviation from the sample was 521. Construct a 95% confidence interval estimate of the average number of web pages visited per month by Canadian Internet users.
b. Assume the standard deviation from the sample was 321. Construct a 95% confidence interval estimate of the average number of web pages visited per month by Canadian Internet users.
c. Assume the standard deviation from the sample was 201. Construct a 95% confidence interval estimate of the average number of web pages visited per month by Canadian Internet users.
d. Compare the three intervals you created for parts a, b, and c of this question. What hap pens to the width of the confidence interval as the variability in the data decreases?


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  • CreatedJuly 12, 2015
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