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asked • 02/15/23Help confidence interval
A sample of size n= 99 is drawn from a population whose standard deviation is =σ 38. Find the margin of error for a 95% confidence interval for μ. Round the answer to at least three decimal places.
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1 Expert Answer
Raymond B. answered • 05/17/24
Tutor
5
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Math, microeconomics or criminal justice
CI= sample mean+/-9.8534
= xbar +/- Margin Of Error
= xbar+/- z(sigma)/sqr(n)
n=99, z=2.56, sigma=38, use z tables or a z calculator
Margin of Error = about 9.8534
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Robert B.
02/22/23