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3. Suppose you are interested in estimating the average salary for biostatisticians in Connecticut. You obtain...

3. Suppose you are interested in estimating the average salary for biostatisticians in Connecticut. You obtain a random sample of 25biostatisticians hired during the last 5 years. The sample data appeared to be approximately normally distributed with no outliers. The average salary for the sample is $45000 and the sample standard deviation is $3150.

A) Construct a 95%confidence interval for µ the true average salary for newly hired biostatisticians in Connecticut.

B) How large of a sample is needed to estimate µ within $2000?

Math   Statistics-And-Probability   
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