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Question 31 The Student Monitor surveyed 405 undergraduates from 100 colleges in order to understand trends...

Question 31

The Student Monitor surveyed 405 undergraduates from 100 colleges in order to understand trends among college students. This sample revealed that the average amount of time spent per week on the Internet was 19.0 hours with a standard deviation of 5.5 hours.

A.) Calculate the 95% confidence interval for the mean time spent per week on the Internet. Show your work or no credit. Just show values plugged into formula, then the final boundary values.   

B.) Suppose the confidence interval bounds are 17 hours to 21 hours. Interpret this 95% confidence interval within the context of this problem.

C.)  If we surveyed MORE than 405 students (still using the same confidence level of 95%), would the margin of error increase, decrease or stay the same?

Math   Statistics-And-Probability   
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