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starting salaries of 80 college graduates who have taken a statistics course to have a mean...

starting salaries of 80 college graduates who have taken a statistics course to have a mean of $42,778 suppose the distribution of this population is approximately normal and has a standard deviation of $ 10,769. using an 81% confidence level, find both of the following

the marine of error

the confidence interval for the mean u: <U<

math   Statistics-And-Probability   
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