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What percentile rank would represent a person with a z score of 3?
The top percentile (> 99.86%)
Is there a difference between the 80th percentile and the top 80?
There is not a difference between the 80th percentile and been in the top 80. This is the same thing just written in different ways.
What does an IQ of 135 or 136 mean?
means that your in the top one percentile of people, which is relativeley smart =)
What does it mean that your 7 year old has a 141 IQ?
It means he has genius level potential. He is in the top 98th percentile of the population.
What is the fifth and 9fifth percentiles?
The 50th percentile is average. The 5th is way below and the 95th is way above.The 5th and 95th percentiles are the lines that set of the "edges of the curve" in a distribution over a bell curve. If you draw the bell, and mark the 5th and 95th percentile spots, those marks separate the bulk of the curve from its edges. The 5th percentile sets off the bottom edge and the 95th percentile sets off the top edge of the curve.
