In the large-sample case a 95 confidence interval estimate for the population mean is given by x 196s Square root ofn. The 95 confidence interval is. Use the given percentage.
The 95 confidence interval is.
The population mean is the average of all the items in a population. Use the given percentage. The sample means target the population mean. When the population standard deviation s is unknown the sample standard deviation is used to estimate s in the confidence interval formula.