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In a study done by a graduate student, the Ave amount of time a college student spends studying a day is 12.5% with an SD 2%. What is the confidence interval if the confidence level is 92% confidence interval is between 9.2 and 15.8 confidence interval is between 9 and 16 confidence interval is between 9.1 and 15.9 confidence interval is between 8.9 and 16.1 confidence interval is between 8.8 and 16.2

You may use the calculator above and this area as scratch paper. To see the solution just click on the button.

Carlos Rodriguez <carlos@math.albany.edu>

This problem was contributed by a student in Elementary Statistics. It is offered as it is with no warranty of any kind
Last modified: Wed May 13 12:29:11 EDT 1998