At a Local Community Meeting with Friends,Jim Heard Dozens of Personal

question 67

Multiple Choice

At a local community meeting with friends,Jim heard dozens of personal testimonials regarding the amazing relief from depression produced by an over-the-counter herbal supplement.Before committing to purchase this herbal remedy,Jim should first determine whether studies of the effectiveness of this remedy had properly controlled for

• A) meta-analysis.
• B) exposure therapy.
• C) the placebo effect.
• D) a token economy.

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Definitions:

Degrees of Freedom

Represents the number of independent pieces of information available to estimate another piece of information or parameter in a dataset.

Test Statistic

A value calculated from sample data during a hypothesis test, used to decide whether to reject the null hypothesis.

T Value

A value derived from a T-test, used to determine if there is a significant difference between two groups.

Independent-Samples T Test

A method of statistical analysis that compares the average values of two separate groups to see if their differences are statistically meaningful.