nursing RRB Nursing Superintendent 2025 Mock Test Quantitative Aptitude Standard Deviation

The heights (in cm) of 10 students in a class are 155, 160, 160, 165, 165, 170, 170, 175, 180, and 180. What is the standard deviation of the heights of the students?

1
4
2
8.1
3
9
4
4.9
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