Test SeriesFree PYQsExamsPricing

MHT CET 2022 Mathematics question

MathematicsStatisticsMHT CET 2022

In an experiment with 15 observations on x, we have , . One observation that was 20 was found to be wrong and was replaced by the correct value 30, then the corrected variance is

Answer: (D)

Solution

Corrected sums: and . With , mean . Variance , option (D). Traps: option (B) 188.66 is just , the mean of squares of the uncorrected data,

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-094332