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Lalneagra Posted 17 years ago
Vocabulary

What is the difference between "percentile" and "percentage"

With the definition of the word "percentile" I found this exemple: "Ninety percent of the values lie at or below the ninetieth percentile, ten percent above it." What does it mean?

AND what is the difference between "percentile" and "percentage"

Lalneagra
  

Top answer

Suppose 100 people take a test of 50 items. If one of them got 40 of the items correct, then the percentage that he got correct is 80. He got 80 percent of the items correct.

— CalifJim

  • Suppose 100 people take a test of 50 items.
  • If one of them got 40 of the items correct, then the percentage that he got correct is 80.
  • He got 80 percent of the items correct.
  • But we don't know what percentile he is in until we see what scores the other 99 people got.
  • Suppose that all 99 of those other people got only 60% (or fewer) of the items correct.
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53 Answers
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Suppose 100 people take a test of 50 items.

If one of them got 40 of the items correct, then the percentage that he got correct is 80. He got 80 percent of the items correct.

But we don't know what percentile he is in until we see what scores the other 99 people got.

Suppose that all 99 of those other people got only 60% (or fewer) of the items correct. Then th
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Crystal clear. Thanks

Lalneagra
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Why is "he" not in the 100th percentile and in the 99th percentile?! I thought you said he did better than all the other 99 people!
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how it is different from ranks
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Because there are only 100 people.
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hm.. This is a statistics-related term actually. Best answer is best. Emotion: smile

Sumie
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CalifJimSuppose that all 99 of those other people got only 60% (or fewer) of the items correct. Then the person who got 80% did better than all other 99 people. He did better than 99% of the whole group of 100, so he is in the 99th percentile.
How many percentiles are there? Anyway?
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I am not sure of the exact definition, but I was always taught to think the following:-
percent/percentage is an Amount out of a hundred.
percentile is a Location within a group of a hundred
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You can not be in the 100% percentile, because you cannot score better than yourself.
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In that case, wouldn't you say that in CJ's example, the person who scored better than the other 99 people would be in the one-hundredth percentile?
CalifJimSuppose that all 99 of those other people got only 60% (or fewer) of the items correct. Then the person who got 80% did better than all other 99 people. He did better than 99% of the whole group of 100, so he is in the
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