SCENARIO 12-17
Three New Different Models of Compact SUVs Have $H _ { 0 } : M _ { 1 } = M _ { 2 } = M _ { 3 }$

Short Answer

SCENARIO 12-17
Three new different models of compact SUVs have just arrived at the market. You are interested in
comparing the gas mileage performance of all three models to see if they are the same. A partial
computer output for twelve compact SUVs of each model is given below:
-Referring to Scenario 12-17, what should be the null and alternative hypotheses of the test? a) $H _ { 0 } : M _ { 1 } = M _ { 2 } = M _ { 3 }$ vs. $H _ { 1 } : M _ { 1 } \neq M _ { 2 } \neq M _ { 3 }$
b) $H _ { 0 } : M _ { 1 } = M _ { 2 } = M _ { 3 }$ vs. $H _ { 1 } : M _ { 1 } \neq M _ { 2 } = M _ { 3 }$
c) $H _ { 0 } : M _ { 1 } = M _ { 2 } = M _ { 3 }$ vs. $H _ { 1 } : M _ { 1 } = M _ { 2 } \neq M _ { 3 }$
d) $H _ { 0 } : M _ { 1 } = M _ { 2 } = M _ { 3 }$ vs. $H _ { 1 } :$ Not all $M _ { j }$ are equal (where $j = 1,2,3$ )