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A student researcher compares the ages of cars owned by students and cars owned by faculty...

A student researcher compares the ages of cars owned by students and cars owned by faculty at a local state college. A sample of 78 cars owned by students had an average age of 5.04 years. A sample of 118 cars owned by faculty had an average age of 8 years. Assume that the population standard deviation for cars owned by students is 3.06 years, while the population standard deviation for cars owned by faculty is 3.24 years. Determine the 98%

confidence interval for the difference between the true mean ages for cars owned by students and faculty.

Step 2 of 3 :

Calculate the margin of error of a confidence interval for the difference between the two population means. Round your answer to six decimal places.

math   Statistics-And-Probability   
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Answer #1

Answer

Given that

z critical for 98% confidence interval is 2.32635

Margin of error =

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