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find the first quartile Q1, which is the IQ score the bottom 25% from the top...

find the first quartile Q1, which is the IQ score the bottom 25% from the top 75% . please explain in details

Math   Statistics-And-Probability   
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Answer #2

Do find out the Q1 and Q3 do the following ( I will help you understand via the below steps). In case you don't understand anything do let me know and I should be able to help you out:

1. Sort the the list of IQ scores by decreasing order of IQ scores

2. Rank this list by percentile, which essentially will say that the highest IQ score is 100 percentile, lowest has the 0 percentile

3. The bottom 25% means that it is a cutoff such that 25 percentile of the IQ scores is lower than this, and 75% of IQ scores are higher than this IQ score.

answered by: anonymous
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