Suppose you are asked to construct a 95% confidence interval for an unknown population mean μ. The population standard deviation is unknown and the sample used to construct the interval has sample size n = 12. What critical value t* should be used in the formula? (Use the t-chart, do not round your final answer.)
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We know that we need to use a t-distribution because the population standard deviation is unknown and the sample size is small (n=12). Show more…
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