Shared Flashcard Set

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Psych Stats Unit 1
Review
20
Mathematics
3rd Grade
09/08/2010

Additional Mathematics Flashcards

 


 

Cards

Term
scale we've been using
Definition
interval
Term
when symmetric (normal) use:
Definition
mean and std dev
Term
when asymm (not normal) use
Definition
median and range
Term
convert the following to z scores...
Definition
score - mean / std dev
Term
converting z score back into raw score
Definition
Z(s) + mean
Term
When they give you a Z score
Definition
look up the percentile
Term
If give percentile...
Definition
look for the closest percentile and give z score
Term
What's the percent of scores higher than...
Definition

Take the given number and do z score eqn

Then look up z score and find percentile

subtract that number from 100.

Term
What's % between two scores?
Definition

convert both numbers into z scores

find percentiles

subtract highest from lowest.

If neg, write as pos

Term
score that cuts off the lowest
Definition

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

Term
score that cuts off highest
Definition

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)

Term
score that cuts off deviant
Definition

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

Term
scores that cut of middle __%
Definition

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.

Term
probability of _ or lower
Definition

find z score of 26

what is the %tile?

p= %tile/100 (move decimal to L 2X)

 

Term
probability or liklihood out of ___ people, __ or lower.
Definition

take number and convert to z

find%tile

divide by 100

multiply by total n provided (out of __)

Term
percentile means
Definition
% that scored lower
Term
When they ask for % that scored higher
Definition
100-percentile
Term
normal mean has a mean of what and SD of what?
Definition

M=0

SD= 1

Term
what does z score mean?
Definition
# std dev above or below the mean
Term
percent between 2 scores
Definition
difference of %tiles
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