Question

(b) the colorado division of wildlife caught 41 bighorn sheep on mt. evans and gave each one an injection to prevent heartworm. a year later, 38 of these sheep did not have heartworm, while the other three did. this is an experiment because a treatment was deliberately imposed on the individuals in order to observe a possible change in the response variable being measured. this is an experiment because observations and measurements of individuals are conducted in a way that doesnt change the response or variable being measured. this is an observational study because a treatment was deliberately imposed on the individuals in order to observe a possible change in the response or variable being measured. this is an observational study because observations and measurements of individuals are conducted in a way that doesnt change the response or the variable being measured.

Explanation:

In an experiment, a treatment is deliberately imposed on individuals to observe a change in the response variable. In an observational study, no treatment is deliberately imposed, and researchers simply observe and measure characteristics of individuals. Here, since the bighorn sheep were given an injection (a treatment), it is an experiment to observe a possible change in the response variable (related to heartworm prevention).

Answer:

This is an experiment because a treatment was deliberately imposed on the individuals in order to observe a possible change in the response variable being measured.