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| a number that describes a particular charateristic of a set of data ie. the mean |
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| defines a sample section of a larger population |
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| all the scores in a specified group |
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| measure of a subset of a population |
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| numerical or nominal charateristic of a population |
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| some numerical or moninal charateristic of a sample |
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| something that exists in more than one form |
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| variable whose levels indicate different amounts |
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| top of the range of possible measurements |
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| is the bottom of the range of possible measurements 7(lower of 6 upper of 8) ex |
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| variables that are measured in different kinds not amounts |
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| is an order of numbers but do not serve as a ratio but rather category |
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| numbers are ranks do not represent things measured |
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Equal difference between numbers represents equal differences in the thing measured
zero has no meaning ex. temperature |
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| measurement scale 0 means something ex. you get a 0 on a test (no grade) aka value |
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| Variable other than the independent variable that can affect the dependent variable |
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| used for interval or ratio data |
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| rectangle/normal two sides mirror each other |
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| assymetrical distribution |
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maybe positive or negative
Positive – More scores at the LOW end of the scale
Negative – more scores at the HIGHER end of the scale |
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| is a description of how skinny or fat a graph is. How concentrated the scores are in the center. |
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mesokurtic
leptokurtic
platykurtic |
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Definition
lepto- top skinny
meso-medium
platy- flat lowest |
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| A graph that shows the relationship between two variables with lines |
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| sum of score divided by the number of the score defined as Xhat |
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| add all the X's which define a score or a variable |
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| descriptive statistic that indicates a typical or representative score |
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| value you get when you subtract the mean from each value |
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| subtrat score from mean then square and sum it all up |
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| nominal scale of measurement |
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| ordinal scale of measurement |
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| interval scale of measurement |
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| ratio scale of measurement |
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| open ended categories or skewed distribution form of measurement |
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to find multiply sample 1 and sample 2 divide by sum of sample 2 ex gpa /credit hours
multiply each and divide by total of credit hours |
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| a quantitative measure of the degree to which scores in a distribution are spread out or clustered together |
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| multipy the sum of F to .25/.75 to find the two percent count up for .25 down for .75 |
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| measure a populations variability |
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| greek sigma (lowercase circle loop) use when data set is available for the population |
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| estimates a population a statistic (estimate of sigma) |
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Definition
| describes a variability of a sample set (statistic) |
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| to find S or weird loopy thing |
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Definition
| find the mean subtract from the score raise to the 2power and divide by n then you square root it =ans |
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Definition
| same as S for X-Xhat)^2 but divide by N-1 this is used for an estimation of a sample set for weird loop thing |
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| Measure of dispersion of scores around the mean. |
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