Question 63

The variance of a set of data is 144. Then the standard deviation of the data is:

Solution

Share

We are given that the variance of the data values in a sample = 144

Since we know that the value of variance is the square of standard deviation.

Therefore, to find the value of standard deviation by using variance, we need to find the square root of the variance.

i.e.

Standard Deviation = $$\sqrt{\text{Variance}}$$

Standard Deviation = $$\sqrt{144}=\sqrt{12^2} = 12$$

Was this solution helpful?

Get AI Help

Create a FREE account and get:

  • Download RRB Study Material PDF
  • 45+ RRB previous papers with solutions PDF
  • 300+ Online RRB Tests for Free

Join CAT 2026 course by 5-Time CAT 100%iler

Start your IIM journey with the right preparation and crack CAT 2026.

Enroll Now
Ask AI