by looking at it and seeing the difference
Compare the shape,center,and spread of the data in the box plots with the data for stores A and B in the two box plots in example 2.
Because you can compare the values easily, for instance, you can compare the highest and lowest value and compare this to the mean, does the highest and lowest value differ greatly from the mean? Then you know the correlation is a bit unpredictable, you can also use this to compare two box plots, putting them together you can see through the median and quartile range the best way to do something, etc.
You can see which has the largest spread of data.... Where the extreme values lie... The bigger the box the wider the spread of half of the data... and vice versa
No because box and whisker plots are related to cumulative frequency curves
spatial figure
Yes, I believe they can.
Nothing. Most box and whisker plots do not have 88 on them!
you use it to compare 2 different sets of data
I believe it was John Tukey in 1997
Parallel box and whisker plots are regular box and whisker plots, but drawn "one-above-the other" on the piece of paper. To enable to do this easily, draw an x-axis which is big enough for the largest value in the data, and small enough for the smallest value in the data (in the entire collection of data). Plot each box-and-whisker diagram below each other.
never, you will never use it
More people in different professions are finding use for box and whiskers plots. It can be used very effectively in time series analysis, which may include engineers, economists, earth scientists, statistician, social sciences and medicine, to name a few professions. Stock market analysis using the open, hi, low & close format as used in Excel is not really the same, but it does show the range of the values for a stock, and relavent values. Excel (by Microsoft) does not have box and whisker plots, but there are many companies selling add in programs to make these plots. I use the Matlab program, which has the capabilities to make box and whisker plots. See related links.