A random variablenbspxnbspfollows a normal distribution


A random variable X follows a normal distribution with standard deviation 13.  A random sample of 30 individuals is selected from the population, and a confidence interval for  is calculated to be (87.348, 96.652).  What is the confidence level for this interval?

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Applied Statistics: A random variablenbspxnbspfollows a normal distribution
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