Given X1=12,X2=19,X3=10,X4=7, then summation of X equals?
Correct answer: B. 48
- A. 36
- B. 48
- C. 41
- D. None of these
Explanation
Add the four observations: 12 + 19 + 10 + 7 = 48. Thus, ΣX represents the total of all listed X-values, not their mean.
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