A Researcher Hypothesizes That Drug Experimentation Is Higher with Seniors

Multiple Choice

A researcher hypothesizes that drug experimentation is higher with seniors than juniors, higher in juniors than sophomores, and higher in sophomores than in first year high school students. In conducting a one-way ANOVA with this data, how can the null hypothesis (H₀) be stated?

A) H₀: all μs are equal
B) H₀: all μs are different
C) H₀: not all μs are different
D) H₀: not all μs are equal