Question

the following graph is an ogive of a standardized tests scores. the vertical axis in an ogive is the cumulative relative frequency and can also be interpreted as a percentile. complete parts a through c.
(a) find and interpret the percentile rank of a test score with a value of 140.
a test score of 140 corresponds to the 50 th percentile rank since this percentage of test scores are less than or equal to a test score with a value of 140.
(b) find and interpret the percentile rank of a test score with a value of 160.
a test score of 160 corresponds to the 90 th percentile rank since this percentage of test scores are less than or equal to a test score with a value of 160.
(c) what score corresponds to the 10th percentile?
the 10th percentile corresponds to a test score of □.

Explanation:

Step1: Locate 10th percentile on y-axis

Find the value 10 on the vertical (percentile) axis of the ogive.

Step2: Find corresponding x-axis value

Draw a horizontal line from the 10th percentile mark to the ogive curve, then draw a vertical line down to the horizontal (test score) axis. The vertical line aligns with the test score 120.

Answer:

120