Starting salaries of 75 college graduates who have taken a statistics course have a mean of $43,737. Suppose the distribution of this population is approximately normal and has a standard deviation of $9,812.
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: _<μ<_