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The average income of new college graduates is assumed to be normally distributed.A sample 81 new college graduate revealed a mean of $ 60,000per year

The average income of new college graduates is assumed to be normally distributed.A sample 81 new college graduate revealed a mean of $ 60,000per year with a standard deviation of $15,000.

Construct a 95% confidence interval for the mean income of all new college graduates.

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