As part of a study to determine factors that may explain differences in animal species relative to their size, the following body masses (in grams) of 50 different bird species were reported in the paper "Temperature and the northern distribution of wintering birds" by Richard Repasky. Ecology: 72(6), 1991: pp 2274-2285. © by the Ecology Society of America.
| 7.7 |
10.1 |
21.6 |
8.6 |
12 |
11.4 |
16.6 |
9.4 |
| 11.5 |
9 |
8.2 |
20.2 |
48.5 |
21.6 |
26.1 |
6.2 |
| 19.1 |
21 |
28.1 |
10.6 |
31.6 |
6.7 |
5 |
68.8 |
| 23.9 |
19.8 |
20.1 |
6 |
99.6 |
19.8 |
16.5 |
9 |
| 448 |
21.3 |
17.4 |
36.9 |
34 |
41 |
15.9 |
12.5 |
| 10.2 |
31 |
21.5 |
11.9 |
32.5 |
9.8 |
93.9 |
10.9 |
| 19.6 |
14.5 |
|
|
|
|
|
|
Does the distribution of the body masses appear to follow a normal distribution? Provide both a graphical and quantitative assessment.