How to Find the 90th Percentile for a Set

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Finding the 90th percentile for a set is something that you can easily do in a very specific way. Find the 90th percentile for a set with help from an experienced math professional in this free video clip.

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Hi, I'm Charlie Kasov, and this is how to find the 90th percentile for a set. Now let's first come up with a set. Let's say we have five, six, seven, eight, 10, 11 and 13. So that's seven numbers in the set. If we'd like to find the 90th percentile of the set of a seven numbers, we do seven times 90 percent, or .90, and we get 6.3. Now 6.3 is not a whole number, so we have to round it down to six, and that means we are gonna find the sixth number in the set, one, two, three, four, five, six. So 11 equals 90th percentile. And that's it. I'm Charlie Kasov and that's how you find the 90th percentile.

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