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

Question

Quizplus · Accepted Answer

The sum of all observations in the sample can be calculated using the formula: Sum of all observations = sample mean * sample size Substituting the values given in the question, we get: Sum of all observations = 15 * 40 = 600 Therefore, the correct answer is C (Σ X_i = 600).

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