A psychologist would like to examine the effects of a new drug on the activity level of birds. Three samples of pigeons are selected with n = 5 in each sample. The birds in the first sample serve as a control and do not get any of the drugs. The birds in the second group receive a small dose, and the birds in the third group each get a large dose of the drug. The psychologist records the activity level for each bird. The data from this experiment are presented below. (Use alpha = .05)

No drug Small dose Large dose

T = 10 T = 20 T = 30

SS = 10 SS = 14 SS = 10

G = 45

X² = 229

N = 15

1. State the hypotheses:(2 points)

Null hypothesis: __________________________________________________________

Alternative hypothesis: _____________________________________________________

1. Identify (i) Independent variable and (ii) Dependent variable. (2 points)
2. Find df = and F critical value (2 points)
3. Do these data indicate any significant differences among the three groups? (6 pts.)

1. Complete Source table (8 pts.)

Source SS df MS

Between treatments ___ ____ ____ F ( ) = _

Within Treatments ____ ____ ____

Total ___ ___ ____

1. State your conclusions, in APA style, using the words of the study. (3 pts.)

(Please label answers)