One possible explanation for why some birds migrate and others maintain year round

residency in a single location is intelligence. Specifically, birds with small brains, relative

to their body size, are simply not smart enough to find food during the winter and must

migrate to warmer climates where food is easily available (Sol, Lefebvre, & Rodriguez-

Teijeiro, 2005). Birds with bigger brains, on the other hand, are more creative and can

find food even when the weather turns harsh. Following are hypothetical data similar to

the actual research results. The numbers represent relative brain size for the individual

birds in each sample.

Non-Migrating

Short-Distance

Migrants

Long Distance

Migrants

18

6

4

N = 18

13

11

9

G = 180

19

7

5

X

2

= 2150

12

9

6

16

8

5

12

13

7

M = 15

M = 9

M = 6

T = 90

T = 54

T = 36

SS = 48

SS = 34

SS = 16

Present a completed results and the decision to be made

. Use

= .05. (5 points)

Please use the below section to answer the question and fill in the table:

Problem Two:

Source

SS

df

MS

Between Treat's.

F( , )=

Within Treat's.

Total

Decision: ______________________________________________________________________