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In a Sample of Size 40,the Sample Mean Is 15

Question 75

Multiple Choice

In a sample of size 40,the sample mean is 15.What is the sum of all observations in the sample?

A) Σ X_i = 200
B) Σ X_i = 400
C) Σ X_i = 600
D) Σ X_i = 800

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