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The Z Test for Independent Groups Is Almost Never Used

Question 78

Multiple Choice

The z test for independent groups is almost never used because it requires that _________ be known.


A) µ 1
B) The z test for independent groups is almost never used because it requires that _________ be known. A) µ <sub>1</sub> B) C) s <sub>2</sub> D) s <sub>2</sub>.
C) s 2
D) s 2.

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