A Psychologist Who Is Interested in Determining the Effects of a New

question 79

Multiple Choice

A psychologist who is interested in determining the effects of a new diet regimen on the stress tolerance level of severely intellectually impaired patients would most likely choose which research method?

• A) naturalistic observation method
• B) telephone survey method
• C) case study method
• D) controlled experiment method

---

Definitions:

Variance

A measure of the dispersion or spread of a set of data points, calculated as the average squared deviation from the mean.

Degrees of Freedom

The number of independent pieces of information in a dataset that are available for estimating a parameter or calculating a statistic.

Student t Distribution

A probability distribution that is used in hypothesis testing for small sample sizes, when the population standard deviation is unknown.

Mean

The arithmetic average of a set of numbers, calculated by adding all the numbers together and dividing by the count of the numbers.