[PDF] Box plots & t-tests



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Interpreting Box Plots – Data on Camping and Backpacking

INTERPRETING BOX PLOTS – DATA ON CAMPING AND BACKPACKING GOODS TEACHER VERSION Subject Level: Middle School Math Grade Level: 6 Approx Time Required:



Interpreting Box-and-Whisker Plots

2) The accompanying box-and-whisker plot represents the cost, in dollars, of twelve CD’s a) Which cost is the upper quartile? b) What is the range of the costs of the CD’s?



Interpreting Box-and-Whisker Plots

d) A score of an 85 on the box-and-whisker plot shown refers to: (1) the third quartile (3) the maximum score (2) the median (4) the mean



The BOXPLOT Procedure - Sas Institute

1076 F Chapter 28: The BOXPLOT Procedure Overview: BOXPLOT Procedure The BOXPLOT procedure creates side-by-side box-and-whiskers plots of measurements organized in groups A box-and-whiskers plot displays the mean, quartiles, and minimum and maximum observations for a group



40 years of boxplots - Hadley Wickham

2 Tukey’s boxplot The basic graphic form of the boxplot, the range-bar, was established in the early 1950’s Spear (1952, pg 164) Tukey’s contribution was to think deeply about appropriate summary statistics that worked for a wide range of data and to connect those to the visual components of the range bar Today, what we call a boxplot



Figure 1: Box & Whisker Diagram, Tukey, 1977

Page 3 of 9 The SAS System’s Proc Boxplot Prior to version eight of SAS, box-and-whisker plots could be produced with Proc UNIVARIATE Proc GPLOT could produce high resolution box-and-whisker plots as an interpolation option, although their is



Box plots & t-tests

2 Calculate the median, 1st and 3rd quartile Step 1: Arrange the values in ascending order 1, 11, 15, 19, 20, 24, 28, 34, 37, 47, 50, 57 Step 2: Calculate the median

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