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- 2011-7-11
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- 2013-8-19
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hi guys, hoping someone can clarify -- I thought that to calculate percentiles, you used the formula (n+1)*(y/100) where y is the percentile eg 50 for 50th percentile etc.
however i recently saw a question that seemed to contradict this.
so, to clarify. if you have 10 numbers in ascending order, is the 50th percentile:
a) the fifth biggest number
or
b) (10+1)*(50/100) ie 5.5, or the point that's halfway between number 5 and number 6 in your list.
this is such a simple topic so i can't understand why there seem to be contradictory ways of solving it. thanks much. |
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