One possible explanation for why some birds migrate and others maintain year-round residency in a single...

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One possible explanation for why some birds migrate and othersmaintain 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 mustmigrate to warmer climates where food is easily available (Sol,Lefebvre, & Rodriguez-Teijeiro, 2005). Birds with biggerbrains, on the other hand, are more creative and can find food evenwhen the weather turns harsh. Following are hypothetical datasimilar to the actual research results. The numbers representrelative brain size for the individual birds in each sample.

Non-Migrating

Short-Distance Migrants

Long- Distance Migrants

8

5

2

11

7

4

17

16

2

23

6

14

16

16

3

Step by step process on SPSS for One-Way ANOVA

a. Use an analysis of variance with alpha .05 to determinewhether there are any significant differences among the threegroups of birds.

b. Compute n2, the percentage of variance explained by thedifferences, between groups, for these data.

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