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A sample of 75 New York public school teachers was surveyed about their salaries. Their mean...

A sample of 75 New York public school teachers was surveyed about their salaries. Their mean salary was $65467 with a standard deviation of $5130.

a. Use the Confidence Interval Calculator and a 90% confidence level to estimate the population mean salary.

$65467 +/- $

b. Use a 95% confidence level to estimate the population mean salary.

$65467 +/- $

c. Use a 99% confidence level to estimate the population mean salary.

$65467 +/- $

Math   Statistics-And-Probability   
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