Probability is the probability associated with the Student's t-distribution. Returns the probability associated with a Student's t-Test. Array1 is an array or range containing the first data set. Array2 is an array or range containing the second data set. Tails specifies the number of distribution tails.
Type is the kind of t test to perform.
Returns an estimate for the variance of a population based on the population sample provided in the list of arguments. Use when you have data for a sample of the population. Can have 1 to 30 arguments. Arguments should be either numbers, or arrays or references that contain numbers. Returns the variance for an entire population, based on the list of arguments.