railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Standard Deviation

The heights of a group of 6 people are 150 cm, 155 cm, 160 cm, 165 cm, 170 cm, and 175 cm. Find the standard deviation of their heights.

1

8.78

2

8.53

3

7.96

4

9.12

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