Concept explainers
The table shows how many votes each student who ran for class president received. What is Li’s percentile rank?
Find the score that has percentile rank of 90 and the score that has percentile rank of 10.
Answer to Problem 16P
score that has percentile rank of 90 = 93
score that has percentile rank of 10 = 76
Explanation of Solution
Given:
Scores of 10 students in a test:
89 , 90 , 76 , 78 , 83 , 88 , 91 , 93 , 96 , 90
Calculation:
Arrange the data in ascending order:
76 , 78 , 83 , 88 , 89 , 90 , 90 , 91 , 93 , 96
So, the percentile rank a data value is the percentage of the number of data values less than or equal to the data value.
Percentile rank of 90 means 90%
Percentile rank of 10 means 10%
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