In random samples of 64 boats out of a total 2400 boats, the mean number of defective boats is 3.2 with a sample standard deviation 0.8. The standard error of the mean is

[A] ~ 0.107

[B] ~ 0.40

[C] ~ 0.97

[D] ~ 0.097

Answer & Explanation
Answer: ~ 0.097

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