Some researchers postulate the frequency of colds can be dramatically reduced with regular exercise. In 2010, a group of researchers published an article related to this research question in Medical News Today. The article was based on the findings of a study by researcher David Nieman that followed 1,002 randomly selected people aged 18-85 years for 12 weeks, asking them whether they usually exercise 5 or more days per week (Yes or No) as well as having them record on a weekly basis whether they had a cold during the previous week (Yes or No).

Suppose the researcher would like to plot the data on whether the study participants usually exercised or more days per week. Which of the following would be an appropriate graph?

a. bar chart
b. a scatterplot
c. parallel boxplots
d. a single histogram

Even before we want to equate or compare the distinct types, a bar chart was being used, it is a set of productivity and profitability, with either the price fluctuations over a given time displayed by each bar.

We would like to compare two different groups here:

Individuals who work out five days a week or even more than that.
Someone who doesn't do 5 or maybe more days of exercising.

The other options offered were never relevant to the relation or condition presented. So, option b seems to be the correct one.