Question

a study was conducted on three types of home siding and the type of damage done to the siding by woodpeckers. each hole made by a woodpecker was classified as either drumming (territorial signaling), foresting (looking for food), or nesting. the following bar chart shows the relative frequency of the holes for each type of siding. which of the following statements is supported by the bar chart? a the proportion of holes created for drumming is the same for all three siding types. b the proportion of holes created for drumming is greatest for grooved plywood. c the proportion of holes created for drumming is least for grooved plywood. d the number of holes created for drumming is least for grooved plywood. e the number of holes created for drumming is greatest for nonwood.

Explanation:

Step1: Analyze bar - chart for drumming proportion

By observing the bar - chart, the height of the light - colored (drumming) part of the bar for grooved plywood is the shortest among the three types of siding. This indicates that the proportion of holes created for drumming is least for grooved plywood.

Step2: Evaluate each option

• Option A: The proportions of drumming holes for the three sidings are different, so this option is incorrect.
• Option B: The proportion of drumming holes is not greatest for grooved plywood.
• Option C: As observed from the chart, the proportion of holes created for drumming is least for grooved plywood, this option is correct.
• Option D and E: The bar - chart shows relative frequencies (proportions), not the actual number of holes. So these options are incorrect.

Answer:

C. The proportion of holes created for drumming is least for grooved plywood.