You sampledn = 10individuals from a population. From each individual, you took two measurements, one for variable X and the other for variable Y.

Your want to explore the relationship between X and Y, so you decide to calculate thecorrelation coefficient,r.

From the X and Y measurements, you calculated thefollowing values:

Ex	Ey	Exy	Ex2	Ey2
160.0	81.1	1441.0	2648.1	1109.7

a)Calculate the correlation coefficient,r.

b) Determine whether the correlation coefficientissignificantlydifferentfrom 0.