153. Student's t
153.1. t-Distribution
Where:
- : t-statistic
- (or ): degrees of freedom
- : Gamma function (generalizes the factorial function)
Continuous probability distribution for estimating the mean of a normally distributed population in situations where:
-
Sample size is small
-
Population standard deviation is unknown
Similar in shape to the normal distribution but has heavier tails, which means it gives more probability to values further from the mean