Confidence Interval estimate
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How do I define the the population and select a simple random sample of size n from the population?
A random sample of n=12 values taken from a normally distributed population resulted in the following sample value:
107 109 99 91 103 105
105 94 107 94 97 113
Use the sample information to construct a 95% confidence interval estimate for the population mean.
I know the confidence level is 95%
then I know how to compute the sample mean but not the sample standard deviation
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