Question

24. Would it be most appropriate to use a bar chart or a histogram to summarize the frequency 27. distribution of each of the following? (al The delay to start a game in minutes (b) The number of students in each of three classrooms (c) The age (in years] that a sample of women first conceived (d] The direction of a person's eye movement [right, left, or centerl when he or she is2 telling a lie

Answer 1

The main difference between bar chart and histogram is that histograms plot quantitative data with ranges of the data grouped into bins or intervals while bar charts plot categorical data.

(a)

Delay to start a game is a quantitative variable. So, it is appropriate to use histogram.

(b)

The classrooms (1, 2, or 3) is a categorical variable. So, it is appropriate to use bar chart to compare the number of students in each class.

(c)

Age of women is a quantitative variable. So, it is appropriate to use histogram.

(d)

Direction of a person's eye movement is a categorical variable. So, it is appropriate to use bar chart to compare the frequency of each eye movement when the person is telling a lie.