Card Set Information
Gettin' numerical up in this biz
Why do we use numerical measures?
Allows us to make comparisons
Gives an idea about the main chunk of the data and where the data is located
Population Mean: μ "mu"
: y (y w/line on top) "y-bar"
Middle value in a data set when values are put in increasing order
In a Box and Whiskers Plot, when it is skewed to the right...
the mean is greater than the median
In a Box and Whiskers Plot, when it is skewed to the left...
the mean is less than the median
In a Box and Whiskers Plot, when it is about symmetric....
the mean and median are about the same
Five Number Summary includes....
1st Quartile (Q1)
value that has 25% of the data below the median
3rd Quartile (Q3)
value that has 25% of the data above the median
Also called box and whisker plots
Presents the 5 number summary in graphical form