Suppose you use simple random sampling to select and measure 25 dogs' weights, and find they have a mean weight of 72 ounces. Assume the population standard deviation is 11.7 ounces. Based on this, construct a 90% confidence interval for the true population mean dog weight. Give your answers as decimals, to two places ± ounces
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The standard error of the mean is the standard deviation divided by the square root of the sample size. In this case, the standard error of the mean is \(11.7 / \sqrt{25} = 2.34\) ounces. Show more…
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