For the following data, S XY is equal to

X 2 4 5
Y 2 3 4

A) 11
B) 9
C) 99
D) 36

Name: For the following data, S XY is equal to X 2 4 5 Y 2 3 4 A) 11 B) 9 C) 99 D) 36
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Question

For the following data, S XY is equal to
 
X              2               4               5
Y              2               3               4
​
A) 11
B) 9
C) 99
D) 36

Quizplus · Accepted Answer

S XY = Σ(XY) - ((ΣX)(ΣY))/n
= (2 x 2) + (4 x 3) + (5 x 4) - ((2+4+5)(2+3+4))/3
= 4 + 12 + 20 - (11 x 3)/3
= 36 - 33
= 3. Therefore, the correct option is D.

For the Following Data, S XY Is Equal to