To Compute a Mean for Scores That Have Been Grouped

question 28

Multiple Choice

To compute a mean for scores that have been grouped into a frequency distribution, we assume that the scores in each interval are________.

• A) spread evenly across the interval.
• B) twice the value of the next lower interval.
• C) located at the lower real limit of the interval.
• D) located at the midpoint of the interval.

---

Definitions:

Specified Number

A particular or exact number that has been identified or stated.

Fixed-interval

A timing-based reinforcement plan where rewards are provided following the first response once a set timeframe concludes.

Variable-interval

An unpredictable reinforcement schedule that provides rewards after an unspecified time period following a response.

Intermittent Reinforcement

Intermittent Reinforcement is a conditioning schedule in which rewards or consequences are given only some of the time, creating strong and persistent responses.