Which of the following is/are true about a normal distribution?
I. It is a bimodal distribution.
II. It can be characterized completely by a single parameter.
III. It ranges from negative infinity to positive infinity.
IV. It is positively skewed.
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A. B. C. D. E. F. G.Explanation
A normal distribution is completely characterized by 2 parameters, mean and variance. It ranges from negative infinity to positive infinity, has a single mode or peak (occurring at the mean), is symmetrical about the mean and has zero skewness.