A Researcher Who Is Evaluating the Significance of a Multiple

question 16

Multiple Choice

A researcher who is evaluating the significance of a multiple regression equation with two predictor variables obtains an F-ratio with df = 2,18.How many individuals were needed to produce the sample data used to find the regression equation?​

• A)​18
• B)​19
• C)​20
• D)​21

---

Definitions:

Fixed-Ratio

A schedule of reinforcement where a response is reinforced only after a specified number of responses, commonly used in behavior modification programs.

Variable-Interval

A schedule of reinforcement where a response is rewarded after an unpredictable amount of time has passed, in operant conditioning.

Fixed-Interval

A schedule in operant conditioning where rewards or responses are provided after a consistent and predictable amount of time has passed.

Variable-Ratio

A schedule of reinforcement where a response is reinforced after an unpredictable number of responses. This schedule creates a steady, high rate of responding.