A sample was taken of computation errors on an exam: 4, 7, 3, 8, 4, 4, 6, 1, 5, 2, 4, 8, 5, 4, 5. What value should be used for the population standard deviation?
A) 0.51
B) 1.99
C) none, since the population standard deviation should never be estimated
D) 1.92
A
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