A) Two methods have been proposed for choosing where to place the salt licks: a simple random sample or a stratified random sample, with area as strata. Give one reason why the stratified random sample might be the better method for choosing where to place the salt licks.

Biologists want to estimate the number of deer living in a certain region. They will use a method known as a hair snare. A hair snare is a length of barbed wire set up near a salt lick, where deer can lick minerals and nutrients from salt deposits. The wire snares hair from the neck of the deer. The hair is collected and sent for analysis.

The biologists will randomly place 90 salt licks throughout the region. The region consists of 3 areas: the town, the forest, and the lake, as shown in the following diagram.