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Starting salaries of 95 college graduates who have taken a statistics course have a mean of...

Starting salaries of 95 college graduates who have taken a statistics course have a mean of $42,149. Suppose the distribution of this population is normal and has a standard deviation of $10,155. Using an 81% confidence level, find both of the following: (NOTE: Do not use commas nor dollar signs in your answers.)

(a) The margin of error:

(b) The confidence interval for the mean μ: ___ <μ< ___

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