In a sample of size 40, the sample mean is 15. In this case, the sum of all observations in the sample is Σ Xᵢ = 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 Σ Xᵢ = 600.
Brand: Quizplus
Rating: 4.7 (43 reviews)

Question

Quizplus · Accepted Answer

To find the sum of all observations in the sample, we can use the formula:

Σ Xᵢ = n x̄

where n is the sample size and x̄ is the sample mean. Plugging in the given values, we get:

Σ Xᵢ = 40 x 15 = 600

Therefore, the statement is true.

In a Sample of Size 40, the Sample Mean Is