box plot

midline is median and star is mean
whisker lines is outer ends of 25 perc
the top of box 3rd quartile from median to top of box
bottom is second quartile from median to bottom of box

top whisker 75 percent plus 1.5iqr

lifo means later months
later months earlier
december picked last

choose black boxplot design for trendline

you must set up all values in one column for a boxplot for two populations one variable. the population name on its left. unless multiple variables

heught of whisker similarity is symmetry

how tall box whiskers are spread of mean
dots are outliers

control asterisk select all adjacent ranges