Norm is interested in whether pet owners are more likely than those who do not own pets to have healthier lifestyles (e. g., exercise regularly, drink moderately, and refrain from nicotine use). by comparing the numbers he gathers on both groups, norm will most likely be using what type of research method?

Quantitative

Explanation:

Quantitative method can be defined as method which can be used in the social science, natural science. In this method systematic models , graphs and charts are used to demonstrate the experiment.

Here, the experiment is done to prove that the population having pets have healthier lifestyles as compared to the population having no pets.

So, here quantitative method is used for this experiment.