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A random sample of 90 observations produced a mean of 32.4 from a population with a...

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Question

Statistics

A random sample of 90 observations produced a mean of 32.4 froma population with a normal distribution and a standard deviation?=2.98.

(a) Find a 90% confidence interval for μ
≤?≤

(b) Find a 95% confidence interval for μ
≤?≤

(c) Find a 99% confidence interval for μ
≤?≤

Answer & Explanation Solved by verified expert
4.2 Ratings (706 Votes)
a Z for 90 confidence interval Z005    See Answer
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