What is Cumulative Percentage in IQ and Index Differences?

Frequently Asked Question:

What is Cumulative Percentage in IQ and Index Differences?

Answer:

What is the Cumulative Percentage as listed under IQ and Index Differences in the Report? The cumulative percentage of a particular category in a frequency table or distribution is the percentage of observations in or below that category. For more information, see page 69 in the WAIS III/WMSIII Technical Manual under the heading "Frequency of IQ Scores and Index Differences," and page 68 under the heading "Statistical Significance of IQ and Index Score Differences."