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

question 10

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 $j = 1,2,3$ )

---

Definitions:

Rectus Femoris

A muscle in the quadriceps group that extends the leg at the knee and assists in hip flexion.

Antagonist

A substance that interferes with or inhibits the physiological action of another, often referring to muscles or drugs.

Biceps Femoris

A muscle of the posterior thigh compartment, important in knee flexion and thigh extension, part of the hamstrings group.

Linea Alba

A fibrous structure that runs down the midline of the abdomen, forming the seam of the abdominal muscles, and serves as an important site for muscle attachment.