Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Box plot

  1. Jul 6, 2009 #1
    Dear all,
    I need to evaluate some data from questionnaires (in the form of scale of values from 0 to 10) and I thought to use the box plots. Please, someone can provide me with some helps (references,etc) for the interpretation? In some cases, the median does not falls inside the box but it is the upper bound of the box, in other cases I have upper or lower wiskers only. What do these mean?

    thank you for your help!

    jo
     
  2. jcsd
  3. Jul 6, 2009 #2

    statdad

    User Avatar
    Homework Helper

    If the median is the upper or lower end of a box then the median equals the lower or upper quartile. If you have only a whisker (say the upper whisker) than almost all of the measurements equal the upper quartile and you have one (or more?) values at the maximum.

    In short, in both situations, you have good numbers of duplicated data values.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Box plot
  1. Box puzzle (Replies: 11)

  2. Researching plots (Replies: 7)

  3. Plots in Mathematica (Replies: 1)

Loading...