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A test is given to a sample of 100 students. Suppose the test scores are 25, 64, . 35. Calculations show that 25 +

A test is given to a sample of 100 students. Suppose the test scores are 25, 64, . 35. Calculations show that 25 + 64 +...+ 35 = 3,900 and 252 + 642 +.+352 = 166,356. The standard deviation is closest to (a) 12 (b) 14 (c) 16 (d) 18 (e) 20

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