The mean and standard deviation of 100 observations were 40 and 5. Find the sum of squares of all observations sum(x_i^2...

Type: MCQ • Marks: 1

The mean and standard deviation of 100 observations were 40 and 5. Find the sum of squares of all observations sum(x_i^2).

A. 1) 165,000

B. 2) 170,000

C. 3) 162,500

D. 4) 160,500

Explanation

Variance = (sum(x^2)/N) - (Mean)^2 => 25 = (sum(x^2)/100) - 1600 => sum(x^2)/100 = 1625 => sum(x^2) = 162,500.

Want to attempt the full test series with a timer and instant score? Purchase the package to unlock the complete test. Purchase Now

UP TGT Mathematics

This page is indexed for search so students can find questions directly from Google.

Welcome to TutorWale!