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Confidence Interval Calculator Population Mean. The point estimate is simply the sample statistic corresponding to the population parameter of interest. With 95 confidence the population mean is between 686 and 714 based on 50 samples. Enter how many in the sample the mean and standard deviation choose a confidence level and the calculation is done live. Confidence interval x 1 x 2 - ts p 2 n 1 s p 2 n 2 where.
Determine the confidence level and find the appropriate z -value. Confidence Interval x - zs n where. You should only use this calculator if a your sample size is 30 or greater. The population parameter in this case is the population mean. We use the following formula to calculate a confidence interval for a difference in population means. What is the margin of error.
In this case the population parameter is the population mean mu.
The formula for a confidence interval for the population mean. 2575 233 205 175 correct answer is not given. Confidence Interval Calculator for the Population Mean. With 95 confidence the population mean is between 686 and 714 based on 50 samples. Please report the error to Dr. A confidence interval corresponds to a region in which we are fairly confident that a population parameter is contained by.