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# Construct a 97% Confidence Interval

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In a recent study of 51 eighth graders, the mean number of hours per week that they watched television 21.9. assume the standard deviation =5.8 hours.

If possible, find the 97% confidence interval of the mean. Interpret the meaning of this interval.

If the standard deviation is doubled to 11.6, what will be the effect on the confidence interval?

How would I attempt this problem?

##### Solution Summary

The solution constructs a 97% confidence interval.

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