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Assume that a sample is used to estimate a population mean μ . Find the 99.5%...

Assume that a sample is used to estimate a population mean μ . Find the 99.5% confidence interval for a sample of size 279 with a mean of 56.9 and a standard deviation of 11.5. Enter your answer as a tri-linear inequality accurate to 3 decimal places. < μ

Math   Statistics-And-Probability   
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Answer #1

The 99.5% confidence interval is:

Explanation:

Mean = 56.9

Sd = 11.5

Sample size n = 279

Since the sample size is large it is good to assume sample sd as population sd

Significance level = 1 -99.5/100 = 0.005

Formula to calculate the confidence interval:

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