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Construct a 90​% confidence interval to estimate the population mean using the accompanying data. What assumptions...

Construct a 90​% confidence interval to estimate the population mean using the accompanying data. What assumptions need to be made to construct this​ interval?

x= 55 σ= 11 n=16

What assumptions need to be made to construct this​ interval?

A. The sample size is less than 30.

B. The population must be normally distributed.

C. The population is skewed to one side.

D. The population mean will be in the confidence interval.

Math   Statistics-And-Probability   
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Answer #1

What assumptions need to be made to construct this​interval?

The population must be normally distributed.

To get critical value use excel command=normsinv(0.1/2)=1.644

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