Question

Arrange the following steps in sequence to find the variance of individual observations.
• [A.] Compute the mean \(\bar{X}\) of the given observations \(x_1, x_2, \ldots, x_n\).
• [B.] Square the deviations obtained and obtain the sum \(\sum_{i=1}^{n} (x_i - \bar{X})^2\).
• [C.] Divide the sum \(\sum_{i=1}^{n} (x_i - \bar{X})^2\) by \(n\).
• [D.] Take the deviations of the observations from mean i.e., \(x_i - \bar{X}, i=1,2,\ldots,n\).
Choose the correct answer from the options given below:

• A. A, B, C, D
• B. A, D, B, C
• C. A, C, B, D
• D. B, C, D, A

Hint:

Always follow: Mean → Deviations → Squaring → Averaging. This is the standard process for variance.

Answer 1

The Correct Option is B