Critical values What critical value t* from Table B should be used for a confidence interval for
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Critical values What critical value t* from Table B should be used for a confidence interval for the population mean in each of the following situations?
(a) A 90% confidence interval based on n = 12 randomly selected observations
(b) A 95% confidence interval from an SRS of 30 observations
(c) A 99% confidence interval based on a random sample of size 58
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