Given the data set X = 3 6 5 2 Y = 0 15 12 5 Already calculated: ?¯x¯ = 4 and ?¯y¯ = 8 and ??Sx = 1.83 and ??Sy = 6.78 a. Calculate Σ(??−?¯)(??−?¯)Σ(xi−x¯)(yi−y¯) Answer = Answer. b. Calculate...

Given the data set

X =     3     6     5     2

Y =     0    15    12    5

Already calculated:  ?¯x¯ = 4 and ?¯y¯ = 8 and ??Sx = 1.83 and ??Sy = 6.78

a.  Calculate Σ(??−?¯)(??−?¯)Σ(xi−x¯)(yi−y¯)

     Answer = Answer.

b.  Calculate correlation coefficient (r).

     Answer = Answer.  Write your answer in 2 decimals.