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mayanfang1

答案和详解如下：

Q6. A normal distribution can be completely described by its:

A)   mean and variance.

B)   skewness and kurtosis.

C)   mean and mode.

Correct answer is A)

The normal distribution can be completely described by its mean and variance.

Q7. A normal distribution is completely described by its:

A)     mean, mode, and skewness.

B)     median and mode.

C)     variance and mean.

Correct answer is C)

By definition, a normal distribution is completely described by its mean and variance.