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A personnel manager has found that historically the scores on aptitude test given to applicants for...

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Statistics

A personnel manager has found that historically the scores onaptitude test given to applicants for entry level positions followa normal distribution. A random sample of nineteen test scores fromthe current group of applicants had a sample mean score of 187.9points and sample standard deviation as 32.4 points.

a. Find the margin of error.

b. Construct a confidence interval estimate for population meanwith 80 percent level of confidence.

c. Construct a confidence interval estimate for population meanwith 85 percent level of confidence.

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SOLUTIONFrom given dataA personnelmanager has found that historically the scores on aptitude testgiven to applicants for entry level positions follow a normaldistribution A random sample of nineteen test scores from thecurrent group of    See Answer
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