The t distribution is used to develop a confidence interval estimate of the population mean when the population standard deviation is unknown.

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Quizplus · Accepted Answer

This is true. The t distribution is a probability distribution that is used for inference in situations where the population standard deviation is unknown and the sample size is small (n<30). The t distribution is similar to the normal distribution, but varies based on the sample size and the degree of freedom.

The T Distribution Is Used to Develop a Confidence Interval