A data consists observations | Statistics | JEE MAIN 2026

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JEE MAIN 2026

06-04-26_S1

Question

A data consists of 20 observations $x_1, x_2, \ldots, x_{20}$. If $\sum_{i=1}^{20}\left(x_i+5\right)^2=2500$ and $\sum_{i=1}^{20}\left(x_i-5\right)^2=100$, then the ratio of mean to standard deviation of this data is:

Select the correct option:

A

2:1

B

3:1

C

3:2

D

4:1

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

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