Reference no: EM132581532

A researcher is examining depression questionnaire scores for individuals who are taking a new depression medication. She knows the population data on the questionnaire is μ = 58, σ = 7.5. She administers a new anti-depression medication to depressed patients and has them take the depression questionnaire. She wants to know if the depression medication decreases their depression scores. Below are the data.

Test at α = .01.

X

53
57
55
56
58
54
55
57
58
59

What is M?