47
(Choose 1 answer)
Suppose data is obtained from 20 pairs of (x,y) and the sample correlation coefficient is 0.7. Find the type of test hypothesis if you want 95% confident that there exist a significant positive linear correlation between x and y.
A. Right tailed t test
B. Two tailed t test
C. Left tailed t test
D. Two tailed z test
E. None of the other choice is correct
