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when symmetric (normal) use: |
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when asymm (not normal) use |
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convert the following to z scores... |
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converting z score back into raw score |
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When they give you a Z score |
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look for the closest percentile and give z score |
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What's the percent of scores higher than... |
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Take the given number and do z score eqn
Then look up z score and find percentile
subtract that number from 100. |
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What's % between two scores? |
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convert both numbers into z scores
find percentiles
subtract highest from lowest.
If neg, write as pos |
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score that cuts off the lowest |
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take the percentage in question
look up to find percentile closest to the number
now have the z score
they want a score
so
do the z score to raw eqn to convert
z(SD) + M |
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score that cuts off highest |
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take number given and subtract from 100
look up that number as a % for z score
then do formula to convert to raw score
(z(SD) + M) |
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score that cuts off deviant |
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take number given and cut in half
__ high, __ low
start with low, look up that number as a %tile for the z score
convert to score (z(SD) + M)
100-__ is __% (highest)
take the opposite of first z score and do same converting eqn |
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scores that cut of middle __% |
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subtract number given from 100.
Take that number and use it as dev. prob
cut it in half
high, low
look up the low as %
plug z score into eqn. z(SD) + M
take opposite z score
do same eqn. |
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probability of _ or lower |
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find z score of 26
what is the %tile?
p= %tile/100 (move decimal to L 2X)
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probability or liklihood out of ___ people, __ or lower. |
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take number and convert to z
find%tile
divide by 100
multiply by total n provided (out of __) |
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When they ask for % that scored higher |
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normal mean has a mean of what and SD of what? |
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# std dev above or below the mean |
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