Question

explain why the vertical axis of a multiple bar graph should describe relative frequency rather than frequency.
choose the correct answer below.
a. a multiple bar graph where the vertical axis describes frequency should not be used because the vertical axis will be too large.
b. a multiple bar graph where the vertical axis describes frequency does not account for the biases of the surveyor as well as a multiple bar graph where the vertical axis describes relative frequency.
c. a multiple bar graph where the vertical axis describes frequency could be misleading because the groups being compared may not have the same number of individuals.
d. a multiple bar graph where the vertical axis describes relative frequency should be used so that all the numbers are closer together.

Explanation:

When comparing groups with different sample - sizes using a multiple bar graph, frequency values can be misleading as they are affected by the number of individuals in each group. Relative frequency (proportion or percentage) standardizes the data, allowing for a fair comparison between groups regardless of their size.

Answer:

C. A multiple bar graph where the vertical axis describes frequency could be misleading because the groups being compared may not have the same number of individuals.