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In: Statistics and Probability

1) A simple random sample of four employees of AIG (which has 20,000 employees in all)...

1) A simple random sample of four employees of AIG (which has 20,000 employees in all) provided the following information on how long they have been working with the firm.

Employee:

Joe

Bryn  

Paige  

Tristan

Years with firm:

20

35

20

25

  

(Assume that “years with firm” for the 20,000 AIG employees is normally distributed).

What are the degrees of freedom (df) for this problem?

Calculate a point estimate of the average (mean) number of years with the firm of all AIG’s employees.

Calculate the sample standard deviation of years with the firm of the 4 employees sampled

Find the margin of error for a 95% confidence level.

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Expert Solution

orchestra answered 2 years ago
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