January 16, 2008

# January 16, 2008 - and their frequency of occurrence Range...

This preview shows pages 1–2. Sign up to view the full content.

January 16 Outline I. Frequency distribution of grouped scores A. Used when the range is large B. Steps 1. Find range 2. Determine interval width (i) 3. List intervals 4. Tally frequencies C. Loss of information II. Computing percentiles A. Preliminary step--determine cumulative frequencies and cumulative percentages B. Find the interval associated with the percentile C. Compute percentile: Percentile point = X L + (i/f i ) (cumf P – cumf L ) III. Computing percentile ranks A. Similar steps, different equation: P. rank = cumf L + ( f i /i) (X - X L ) x 100% N

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Frequency distribution: presents the score values
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: and their frequency of occurrence Range: the difference between the highest and lowest score in the distribution Percentile: the value on the measurement scale below which a specified percentage of the scores in the distribution fall Cumulative frequency: the number of scores that fall below the upper real limit of an interval Cumulative percentage: the percentage of scores that fall below the upper real limit of an interval Percentile rank: the percentage of scores with values lower than the score in question...
View Full Document

{[ snackBarMessage ]}

### Page1 / 2

January 16, 2008 - and their frequency of occurrence Range...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online