Chapter PIII, Problem 3RE

To determine

To find: that it is an observational study, sample survey or an experiment and all the parameter of this study and survey and types of conclusions could be reached on the basis of given data.

Explanation of Solution

Researchers have evidence that proves the connection between longevity and diet. This was an experiment and was consistent with sex and diet.

There was one factor in the experiment, diet at 2 levels, which allows dogs to eat whatever they wanted and limited diet, resulting in 2 treatments.

The function of randomization is that each treatment must be randomly distributed to each pair of puppies for equal opportunity. Length of life is the answer component.

The experiment concludes that the limited diet group ensures that a diet with a 25 percent lower calorie diet lives longer than the group that encourages dogs to consume whatever they want.