Question

A researcher is running an experiment on the effectiveness of three different energy drinks. She randomly selects 150 individuals from the population and evenly splits them into three groups, each which consumes a different energy drink (Drink A, Drink B, Drink C). State the Null and the Research / Alternative Hypotheses.

Answer 1

H0: Null Hypothesis: $\mu _{A}=\mu _{B}=\mu _{C}$ (The means of all the 3 drinks: Drink A, Drink B and Drink C are the same)

HA: Alternative Hypothesis: $\mu _{A}\neq \mu _{B}\neq \mu _{C}$ (The means of all the 3 drinks: Drink A, Drink B and Drink C are not the same. At least one mean is different from the other two drinks)