state gov UP Lekhpal Mock Test 2023 - 24 Quantitative Aptitude Standard Deviation

The standard deviation of the lengths (in meters) of a group of 15 ropes is 2.8 meters. What is the variance of their lengths?

1

8.88 meters²

2

6.34 meters²

3

4.89 meters²

4

7.84 meters²

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