WARNING: IF YOU HAVE NO STATISTICS BACKGROUND THIS WILL BE UTTER GIBBERISH.
Like the SATs. The SATs are graded on a scale of 200-800, with a mean of 500 and a standard deviation of 100. So 600 is z = 1, 700 is z = 2, 800 is z = 3.
But here’s the thing, why do they even mess with the whole 200-800 number? Why don’t they just give you a z-score as what you got on the SAT.
Because with the current system, to convert SAT to IQ, you have to:
- Take score
- Subtract out 500
- Divide by 100
- Multiply by 15
- Add 100
BUT WHY DON’T THE IQ PEOPLE EVEN JUST SAY OKAY YOUR IQ IS -1, or 1, or 2, or 3, or 4, or whatever.
Cause if they did that anyone could know what the score to any test meant, just by the Z.
[SIZE=7]So therefore, in conclusion, all standardized tests or measures should be scored by z score, with 0 being average, -1… being below average, and 1… being above average.
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