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Determine the margin of error for a confidence interval to estimate the population mean with n=18...

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Basic Math

Determine the margin of error for a confidence interval toestimate the population mean with n=18 and s=12.1 for theconfidence levels below.

A) The margin of error for an 80% confidence intervalis:

B) The margin of error for an 90% confidence intervalis:

C) The margin of error for an 99% confidence intervalis:

Answer & Explanation Solved by verified expert
3.6 Ratings (328 Votes)
Sample size n 18Standard deviation s 121AWe have to find the margin of error for an 80 confidenceintervalHere E is    See Answer
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