Question

Estimation And Confidence Intervals

Dr Susan Benner is an industrial psychologist.She iscurrently studying stress amoung executives of Internetcompanies.She has developed aquestionnaire that shebelieves measures stress.A score above 80 indicates stressat a dangerious level.A random sample of 15 executivesrevealed thefollowing stress level scores.94788390789997 909790939410075 84A.Find the mean stress level for this sample. What is the point estimate of the population mean?B.Construct a 95 percent confidence level for thepopulation mean.C.Is it reasonable to conclude that Internet executiveshave a mean stress level in the dangerous level, according to Dr.Benner's test?

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