And theoretically the standard deviation of the sampling distribution should be equal to sn which would be 9 20 2012. M population mean s population standard deviation n sample size X random variable P x 6. Begin aligned mu_ bar xmu sigma_ bar xdfrac sigma sqrt n end aligned mxˉ.
First you will need to count how many sample items you have within a data set and add up the total amount of items.
Watch this short podcas. The sample mean is a random variable. Simply enter the appropriate values for a given distribution below and then click the Calculate button. Use the mean to find the variance.