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A consultant is analyzing demographic characteristics of two popular television programs, COPS (population 1) and 60 Minutes (population 2). Previous studies indicate no difference in the ages of the two audiences. That is, the mean age of each audience is the same. The consultant plans to test this hypothesis by randomly selecting a sample from each population.

His null hypothesis is:

A

Null hypothesis: $µ1 - µ2 ≤ 0$

B

Null hypothesis: $µ1 ≠ µ2$

C

Null hypothesis: $µ1 - µ2 ≥ 0$

D

Null hypothesis: $µ1 - µ2 = 0$

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