If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Sample means and the central limit theorem


The wingspans of a common species of housefly are normally distributed with a mean of 15, start text, m, m, end text and a standard deviation of 0, point, 5, start text, m, m, end text. Suppose that a biologist regularly collects random samples of 20 of these houseflies and calculates the sample mean wingspan from each sample.
What will be the shape of the sampling distribution of the sample mean wingspan?
Choose 1 answer: