Ten pairs of points yielded a correlation coefficient r of 0

Ten pairs of points yielded a correlation coefficient, r, of 0.79. Using a .05 significance level, which of the following statements is correct?

Because 0.79 is greater than 0.632, the null hypothesis is not rejected.

Because 0.79 is greater than 0.632, the null hypothesis is rejected

Because 0.79 is greater than 0.602, the null hypothesis is not rejected.

There is no correlation between the variables.

Solution

for n=10, df = n-2 = 8, from critical r table, we see criticial value is +/- 0.632 for 0.05 level, and since 0.79 is greater than 0.632, we reject null.

option (B)