If n=13, x-bar=48, and s=9, find the margin of error at a 80%
confidence level
Give your answer to two decimal places.
Solution :
Given that,
t /2,df = 1.356
Margin of error = E = t/2,df * (s /n)
= 1.356 * (9 / 13)
Margin of error = E = 3.38
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