In: Math
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 |
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 determine whether there are any significant differences among the three groups of birds.
b. Compute n2, the percentage of variance explained by the differences, between groups, for these data.