T Test Correlation Table. Df n 1 where n represents the number of pairs across the two sets of scores. The formula for the test statistic is t r n 2 1 r2 t r n 2 1 r 2.
The p value is the combined area in both tails. The value of the test statistic t is shown in the computer or calculator output along with the p value. The test statistic t has the same sign as the correlation coefficient r.
The df for the correlated t test is calculated as.
The test statistic t has the same sign as the correlation coefficient r. The correlation coefficient is zero. First the table has vertical rules. For example t 0 5 of single tailed test equals to t 0 25 of two.
