- A8.46
- B10.38
- C10.58
- D107.69
Step-by-Step Solution
Class marks 5, 15, 25, 35, 45; the table is symmetric, so the mean is 25. . Variance , SD . (10.58 divides by 25; 107.69 is the variance.)
Answer: B) 10.38
The histogram shows the scores of 26 players in a fitness test. Using class marks, find the standard deviation of the scores.
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