Refer to Exhibit 7-6. What is the null hypothesis?
a. mGroup 1 ³ (mGroup 2 + mGroup 3 + mGroup 4) /3
c. mGroup 1 =mGroup 2 = mGroup 3 = mGroup 4
b. mGroup 1 £ (mGroup 2 + mGroup 3 + mGroup 4) /3
d. None of these are true.
C
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