What the 95 percent confidence interval about the mean
If the sample standard deviation is 10.5 and the sample mean is 48 based on a study with a sample size of 120, what the 95 percent confidence interval about the mean is between approximately:
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Compute a 90% confidence interval for the population mean, based on the sample 25, 27, 23, 24, 25, 24, and 59. Change the number from 59 to 24 and recalculate the confidence interval.
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