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QuestionAnswer
categorical graphical displays pie chart, bar graph
quantitative graphical displays histogram, dot plot
frequency table for continuous variable find min and max, choose intervals that don't overlap, count number of obs in those intervals and then put those into table for relative frequency
OPEN INTERVAL does NOT include both end points, open = closed
CLOSED INTERVAL does include both end points closed = open
reason variance is squared so the values don't cancel each other out
bivariate quanitiative data expressions graphical: scatter plot, numerical: correlation coefficient
can only use correltaion coefficient for LINEAR stuff
Sx vs Sxx Sx - sample standard deviation Sxx - sum of squared deviations
coefficient of determination r^2 - provides percentage of variaibility in y as explained by x
IQR is the 50th percentile
pth percentile that percent is at or below the percentile
slope and correlation might have diff values but always same sign!
Created by: JingW19
 

 



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