What does the following mean in words: H0 ?1 = ?2?
a. The mean of population 1 is equal to the mean of population 2
b. The mean of population 1 is not equal to the mean of population 2
c. The mean of sample 1 is not equal to the mean of sample 2
d. The mean of sample 1 is equal to the mean of sample 2
A
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