Homework Help: Statistics

Posted by Olivia on Wednesday, November 7, 2012 at 11:39am.

Let’s suppose a randomly selected sample of 75 American teenagers watches an average of 1472 hours of television per year with a standard deviation of 250 hours. Construct the 95% confidence interval (CI) for the mean number of hours American teenagers watch television per year

Statistics - MathGuru, Wednesday, November 7, 2012 at 5:28pm
Formula:

CI95 = mean ± 1.96(sd/√n)

With your data:

CI95 = 1472 ± 1.96(250/√75)

Finish the calculation for your confidence interval.

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