Calculate the Mean and Standard Deviation for Each Group from the Data

question 19

Multiple Choice

Calculate the mean and standard deviation for each group from the data below. ANSWERS
If the equation for the above study was: score = (b₀ + b₁PST_i + b₂gender_i + b₃interaction_i) +E_i, how would you express the interaction effect between the PST and the gender?

• A) PST × gender
• B) PST + gender
• C) PST / gender
• D) PST - gender

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Definitions:

Parallel Forms

A method of reliability assessment in psychometrics where two different versions of a test are used to measure the same construct, to check for consistency.

Interrater

Relates to the degree of agreement among independent observers or raters evaluating the same phenomenon.

Predictive Validity

The extent to which a score or measurement can accurately predict future performance or behavior.

Concurrent Validity

A measure of how well a particular test correlates with a previously validated measure.