Lyle Conducted a Study to Determine If a New Class

question 23

Multiple Choice

Lyle conducted a study to determine if a new class program could increase the test performance of students with high functioning autism.His experiment specifically included those students who already had high test scores.He should be concerned about which potential form of internal invalidity in his experiment?

• A) mortality.
• B) testing.
• C) maturation.
• D) statistical regression.
• E) history.

---

Definitions:

Discrete Random Variable

A type of random variable that can take on a countable number of distinct values, often used to model scenarios where outcomes are countable.

Expected Number

The calculated average or mean value of a numerical random variable, representing what one expects to happen over numerous trials.

Probability Distribution

A statistical function detailing all potential values and their probabilities for a random variable within a specific range.

Probability Distribution

A mathematical function which calculates the likelihood of various possible results in an experiment.