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The data shown represent the scores on a national achievement test for a group of 10th grade students.
Find the approximate percentile ranks of these scores by constructing a percentile graph (Ogive).
Use the Ogive, estimate percentile of a student who scored 200 points in the test? What is the student
score must be in order in the 90 percentile?
Score
classes
Freq. Score
upper
limit
Cumulative
Freq.
Relative
< 196.5 0 < 196.5
196.5 – 217.5 5 < 217.5
217.5 – 238.5 17 < 238.5
238.5 – 259.5 22 < 259.5
259.5 – 280.5 48 < 280.5
280.5 – 301.5 22 < 301.5
301.5 – 322.5 6 < 322.5
Total 120
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