T Test Formula In Statistics. The student s t test is shown below. The numerator in the 1 sample t test formula measures the strength of the signal.
Consider the patient waiting time example with the hypothesized mean wait time of 15 minutes. Array2 it is a required argument the second data set. Student t test is a statistical test which is widely used to compare the mean of two groups of.
The formula of t test includes 4 types of arguments.
Begin array l qquad t frac bar x 1 bar x 2 s bar delta text where qquad s bar delta sqrt frac s 1 2 n 1 frac s 2 2 n 2 end array. In this formula t is the t value x 1 and x 2 are the means of the two groups being compared s 2 is the pooled standard error of the two groups and n 1 and n 2 are the number of observations in each of the groups. As mentioned above one sample t test is used to compare the mean of a population to a. T test array1 array2 tails type the formula uses the following arguments.
