The following graph is an ogive of IQ scores. The vertical axis in an ogive is the cumulative relative frequency and can also be interpreted as a percentile.

(a) Find and interpret the percentile rank of an individual whose IQ is 100.
(b) Find and interpret the percentile rank of an individual whose IQ is 120.
(c) What score corresponds to the 60th percentile for IQ?

Transcribed Image Text:

Percentile Ranks of IQ Scores 100 80 40 20 40 60 80 100 120 140 160 180 IQ