When a researcher looks at her personality questionnaire data from 75 participants, she notices limited variance in scores, except for one score falling 4 standard deviations above the mean. This score is
A) outside the sampling frame.
B) evidence of negative skew.
C) invalid.
D) an outlier.

Question

Quizplus · Accepted Answer

This score is an outlier, meaning it is statistically different from the rest of the scores and may be influencing the overall results. It is not necessarily invalid, but the researcher should investigate the outlier to determine if it is a legitimate response or due to measurement error or other factors.

When a Researcher Looks at Her Personality Questionnaire Data from 75