(1 point) working backwards, part i. a 90% confidence interval for a population mean is (70, 76). the population distribution is approximately normal and the population standard deviation is unknown. this confidence interval is based on a simple random sample of 26 observations. calculate the sample mean, the margin of error, and the sample standard deviation. use the t distribution in any calculations. round non-integer results to 4 decimal places.
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Category: statistics |
Author: Sagi Boris
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