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Stats - Chapter 2

statistics

TermDefinition
raw data hasn't been manipulated
frequency distribution organization of raw data in table form
categorical frequency distributions organizes nominal or ordinal data
n represents how big the sample size is
f frequency
class width distant/amount it takes to get to the next
class width formula (use when raw data) (large dv. - small dv.)/ # of classes
class midpoint - Xm average lower and upper class limits
cf adds up frequencies
rf f/n
difference between ll and ul diagonal must be less by 1
histogram class boundaries = x frequencies = y
frequency polygon midpoints = x frequencies = y begins and ends on the axis
ogive class boundaries = x cf = y
rcf added up f above n
right skewed positively
left skewed negatively
bimodal top units are tied
pareto chart always starts at its highest data point
find degrees from data (f/n) x 360
Created by: ammorale
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