Examples: Finding
Percentiles
1. The math test scores were: 50, 65, 70, 72, 72, 78, 80, 82, 84, 84, 85, 86, 88,
88, 90, 94, 96, 98, 98, 99. Find the percentile rank for a score of 84 on this test.
2. The math test scores were: 50, 65, 70, 72, 72, 78, 80, 82, 84, 84, 85, 86, 88,
88, 90, 94, 96, 98, 98, 99. Find the percentile rank for a score of 86 on this test.
3. Question: The scores for student are 40, 41, 42, 43, 45, 47, 49, 50, 51, 51, 54, 57, 59, 60,
61, 63, 67, 69, 70, 71. Find out the percentile for score 51.
4. The scores for student are 21, 24, 26, 27, 28, 28, 31, 32, 34, 36, 39, 40, 42, 44, 45, 46, 49, 53,
57, 60. Find out the percentile for score 28.
5)#The#following#data#give#the#number#of#keyboards#assembled#at#the#Twentieth#
Century#Electronics#Company#for#a#sample#of#25#days.#
#45###52#48#41#56#46#44#42#48#53#51#
#53###51#48#46#43#52#50#54#47#44#47#
#50###49#52#
#
#a)#Calculate#the#values#of#the#three#quartiles#and#the#interquartile#range.#
#b)#Find#the#percentile#rank#of#50.#
#
6)#The#following#data#give#the#number#of#runners#left#on#bases#by#each#of#the#30#
Major#League#Baseball#teams#in#the#games#played#on#August#12,#2004.#
# 6# 6# 6# 7# 6# 10# 6# 3# 6# 8# 10#
# 7# 18#11# 6# 9# 4# 8# 9# 5# 5# 4#
# 8# 8# 8# 5# 5# 5# 13# 8#
# #
a)#Calculate#the#values#of#the#three#quartiles#and#the#interquartile#range.#
b)#Find#the#percentile#rank#of#10.#
