Question

Calculate the t-test statistic for whether the correlation coefficient between the two variables below differs significantly from 0. (Hint: You will first need to calculate the correlation coefficient.)

56        78

53        75

16        46

20        34

101      52

32        36

56        78

73        94

45        13

23        103

Answer 1

correlation coefficient r=		Sxy/(√Sxx*Syy)               =		0.206
test statistic:                t=		r*(√(n-2)/(1-r2))	=	0.594