Dependent Sample T Test Formula. In a hypothesis tests there are two types of errors. The dependent t test also called the paired t test or paired samples t test compares the means of two related groups to determine whether there is a statistically significant difference between these means.
μ1 μ2 the two population means are equal h1. μ1 μ2 the two population means are not equal. One sample has been tested twice repeated measures or two samples have been matched or paired in some way.
The formula for a t statistic for two dependent samples is.
Thus our decision rule for this two tailed test is. If t is less than 2 2622 or greater than 2 2622 reject the null hypothesis. The dependent t test for paired samples is used when the samples are paired. We find a critical value of 2 2622.
