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You may notice... that if you add your five raw scores up and divide by 5, you will get your raw score average, your composite raw score.
Each one of the six scores is set on it's own sliding percentile scale...which means...you will NOT be able to average your 5 subset percentiles and get your composite percentile. The standard deviations are different for each subset, and this is why it happens.
BTW: Our PCAT's are graded compared to how people did five years ago on this test, the "core group" or whatever they call it. So it is possible, yet highly improbable for everyone that took the Oct 06 test to get 99's. Repeat, your percentiles compare to people who took it 5 years ago, and not the result of everyone who took it Oct 06. The idea is that the tests are supposedly very similar through the years... and the math behind that is.. well not fun.
Thought I would try to clear that up, but probably more people are just confused now...😱
Each one of the six scores is set on it's own sliding percentile scale...which means...you will NOT be able to average your 5 subset percentiles and get your composite percentile. The standard deviations are different for each subset, and this is why it happens.
BTW: Our PCAT's are graded compared to how people did five years ago on this test, the "core group" or whatever they call it. So it is possible, yet highly improbable for everyone that took the Oct 06 test to get 99's. Repeat, your percentiles compare to people who took it 5 years ago, and not the result of everyone who took it Oct 06. The idea is that the tests are supposedly very similar through the years... and the math behind that is.. well not fun.
Thought I would try to clear that up, but probably more people are just confused now...😱
