Test Statistic Formula Correlation Coefficient. Whenever any statistical test is conducted between the two variables then it is always a good idea for the person doing analysis to calculate the value of the correlation coefficient for knowing that how strong the relationship between the two variables is. The formula for the test statistic is.
R has a t distribution with n 2 degrees of freedom and the test statistic is given by. The formula for the test statistic is t r n 2 1 r2 t r n 2 1 r 2. Our result is 0 5298 or 52 98 which means the variables have a moderate positive correlation.
The value of the test statistic t is shown in the computer or calculator output along with the p value.
Please enter the necessary parameter values and then click calculate. The p value is the combined area in both tails. The test statistic t has the same sign as the correlation coefficient r. Whenever any statistical test is conducted between the two variables then it is always a good idea for the person doing analysis to calculate the value of the correlation coefficient for knowing that how strong the relationship between the two variables is.
