Which of the following statements about the t distribution with degrees of freedom df is (are) true?
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Which of the following statements about the t distribution with degrees of freedom df is (are) true?
I. It is symmetric.
II. It has more variability than the t distribution with df + 1 degrees of freedom.
III. As df increases, the t distribution approaches the standard Normal distribution.
(a) I only
(c) III only
(e) I, II, and III
(b) II only
(d) I and III
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