What is a one sample t test? The t test is a commonly used hypothesis test in statistics that allows us to compare the mean value of a group of sampled data with some hypothesized value, usually a ...

Two-sample t-tests are statistical tests used to compare the means of two populations. Also known as Student’s t-tests, their results are used to determine if there ...

Your support goes further this holiday season. When you buy an annual membership or give a one-time contribution, we’ll give a membership to someone who can’t afford access. It’s a simple way for you ...

Is there something racist in the way the chattering classes discuss the low number of black students admitted to New York City’s most selective public high schools? The figures are depressing indeed.

Ms. Cordova, a co-founder of the Tularosa Basin Downwinders Consortium, wrote from Albuquerque. July is a hard month for a lot of us here in New Mexico, where thousands of people’s lives were upended ...