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stats 210
stats definitions and examples
7
Other
Undergraduate 1
02/16/2010
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Term
population mean
 Definition
sum of all measurements in pop. divided by how many there are.
Term
median
 Definition
central value, larger than 1/2 data and smaller than the other half
Term
range
 Definition
difference btwn smallest and largest measurement
Term
standard deviation
 Definition
measure of variability about the mean
Term
interquartile range
 Definition
measure of dispersion around the median
Term
lower quartile
 Definition
measurement larger than 25% of data and smaller than 75%
Term
upper quartile
 Definition
measurement larger than 75% of data and smaller than other 25%
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