Let X1, X2, X3, …, Xn be a random sample from N(mu, sigma^2). Consider the statistic s^2 = 1/n-1sumi=1^n(Xi-overlineX)^2. What is V(s^2) equal to?

Q6Section I (Objective (Q1–Q80))6 of 80

Statistical Inference — variance of the sample variance

Let $X_1, X_2, X_3, …, X_n$ be a random sample from $N(\mu, \sigma^2)$ . Consider the statistic $s^2 = \frac{1}{n-1}\sum_{i=1}^{n}(X_i-\overline{X})^2$ . What is $V(s^2)$ equal to?

Pick an option to check your answer. In a mock test a wrong answer here costs 0.83 mark.

Keyboard: A–D answer · S solution · ←/→ previous/next