. In zoology, Bergmann's rule claims that for endothermic (warm-blooded) species the body mass of individuals will increase with latitude and colder climate. Basically, in mammals and birds, individuals of a particular species living in colder areas will tend to have greater mass than individuals living in warmer areas. The idea is that larger animals have a lower surface to volume ratio than smaller animals, so they radiate less body heat per unit of mass and, therefore, stay warmer in cold climates.

Two students decide to test this rule during spring break. One went home to Old Forge, New York in the Adirondacks and the other went to Fort Lauderdale, Florida. Both took with them mouse traps and scales. While on break each trapped and weighed 20 white-footed mice, Peromyscus leucopus. Their data are summarized below.

Old Forge	Fort Lauderdale
X=24.2 gm	X=22.6gm
s^2=1.69 gm^2	s^2=2.25gm^2

Do the data support Bermann's rule? Assume normality and analyze parametrically.