Calculating a percentile
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8 Terms
1
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Formula
K/100 x n
where k is the percentile
Where n is the total number of numbers in the set
2
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Flashcardp summary
3
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Remember!!
Sets must be in chronological order
1,2,4,7,9 not 9,1,4,2,7
4
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Get the percentile number
Example:
P90
5
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Get the total number of numbers in the set
Example:
5,6,7,8,10,11,13
Total no of nos =7
6
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Fill in the percentile values for k and no of nos for n, in the formula ( k/100 x n )
Example:
90/100 × 7 = 6.3
7
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Round your answer to the nearest whole number
Example:
6.3 → 6
8
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Count to the (rounded) answers place in the set. And that’s your answer
Example:
The 6th place in the set 5,6,7,8,10,11,13 is 11
Ans: 11
.•. P90 = 11
Note 
Flashcards (44)