PC Data Analysis and Interpretation Flashcards
6 cards from real PC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 PC Data Analysis and Interpretation flashcards as text
Which statistical measure is used to describe the spread of scores around the mean in a psychometric dataset?
Answer: Standard deviation
Standard deviation quantifies how much individual scores deviate from the mean, making it the primary measure of score spread.
In psychometric data analysis, a correlation coefficient of 0.00 indicates:
Answer: No linear relationship between variables
A correlation coefficient of 0.00 indicates no linear relationship exists between the two variables being studied.
When interpreting a percentile rank of 75 on a psychometric test, a psychometrician would conclude that the examinee:
Answer: Scored higher than 75% of the norm group
A percentile rank of 75 means the examinee scored equal to or higher than 75% of individuals in the normative reference group.
Which type of score transformation converts raw scores to a distribution with a mean of 50 and standard deviation of 10?
Answer: T-scores
T-scores are standardized scores with a fixed mean of 50 and standard deviation of 10, commonly used in psychological assessments.
Factor analysis in psychometrics is primarily used to:
Answer: Identify underlying constructs that explain item correlations
Factor analysis identifies latent constructs or dimensions that account for the pattern of correlations among test items.
A psychometrician analyzing item difficulty would flag an item with a p-value of 0.95 because it:
Answer: Is too easy and provides little discrimination
A p-value of 0.95 means 95% of examinees answered correctly, indicating the item is too easy to effectively differentiate ability levels.