In a sample of size 40, the sample mean is 15. In this case, the sum of all observations in the sample is ΣXi = 600.

Name: In a sample of size 40, the sample mean is 15. In this case, the sum of all observations in the sample is ΣXi = 600.
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Quizplus · Accepted Answer

The sample mean is calculated by dividing the sum of all observations by the sample size. So, if the sample mean is 15, then (ΣXi)/40 = 15. Multiplying both sides by 40, we get ΣXi = 600. Therefore, the statement is true.

In a Sample of Size 40, the Sample Mean Is