Below Is a Histogram of the Number of Repetitions of a Chin-Up

question 3

Multiple Choice

Below is a histogram of the number of repetitions of a chin-up exercise the members of two high school gym classes could do. For reference: the minimum done was two students doing none; the most, two students doing 12. Approximately how many students did fewer than the 10 repetitions recommended by the presidential fitness guidelines?

• A) 3
• B) 6
• C) 44
• D) 50
• E) Not enough information

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Definitions:

Probands

Individuals who are the subject of study or the starting point in a genetic or medical investigation, often because they present with a particular condition of interest.

Single-Case Experimental Design

Experimental design in which an individual or a small number of individuals are studied intensively; the individual is put through some sort of manipulation or intervention, and his or her behavior is examined before and after this manipulation to determine the effects.

Case Study

An in-depth investigation of a single individual, group, event, or community to explore causation in order to find underlying principles.

Manipulation

The act of controlling or influencing others in a deceptive or unscrupulous way, often for personal gain.