PC PC Data Analysis and Interpretation

Question 1

Which statistical measure is used to describe the spread of scores around the mean in a psychometric dataset?

Accepted Answer

Standard deviation

Answer

Median

Answer

Mode

Answer

Range only

Question 2

In psychometric data analysis, a correlation coefficient of 0.00 indicates:

Accepted Answer

No linear relationship between variables

Answer

A perfect positive relationship

Answer

A perfect negative relationship

Answer

Moderate positive correlation

Question 3

When interpreting a percentile rank of 75 on a psychometric test, a psychometrician would conclude that the examinee:

Accepted Answer

Scored higher than 75% of the norm group

Answer

Answered 75% of items correctly

Answer

Is in the top 25% of all possible scores

Answer

Has a scaled score of 75

Question 4

Which type of score transformation converts raw scores to a distribution with a mean of 50 and standard deviation of 10?

Accepted Answer

T-scores

Answer

Z-scores

Answer

Stanines

Answer

NCE scores

Question 5

Factor analysis in psychometrics is primarily used to:

Accepted Answer

Identify underlying constructs that explain item correlations

Answer

Establish test-retest reliability

Answer

Calculate standard error of measurement

Answer

Determine sample size requirements

Question 6

A psychometrician analyzing item difficulty would flag an item with a p-value of 0.95 because it:

Accepted Answer

Is too easy and provides little discrimination

Answer

Is too difficult for the population

Answer

Has poor construct validity

Answer

Shows negative point-biserial correlation