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A survey of eight vice presidents of information technology and information systems who had been in...

A survey of eight vice presidents of information technology and information systems who had been in their current position for 10 years or less, revealed &174,813 as average salary. Assume a random sample with a standard deviation of $25,000.

a. Find the 95% confidence interval for the population mean salary.

b.find the 99% confidence interval for the population mean salary.

c. complete the following sentence: We are 95% sure that the population mean salary is at least................

Math   Statistics-And-Probability   
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