Identify the median line inside the box
Read the lower edge of the box as the first quartile
Read the upper edge of the box as the third quartile
Calculate the interquartile range as the distance between the first and third quartiles
Read the whiskers as the lowest and highest non-outlier values
Check for outliers shown as separate points beyond the whiskers
Compare the median position within the box to assess skewness
Compare box lengths to assess spread
Compare whisker lengths to assess tail length
Compare multiple box plots by median, spread, and outliers