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Interpreting Back-to-Back Stem & Leaf Plots

The title explains it all... :-p

Andrew Lanning

on 22 April 2010

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Transcript of Interpreting Back-to-Back Stem & Leaf Plots

Represent this data in a back to back stem and leaf plot:
Calculate Summary Statistics (mean, standard devation, median and Interquartile Range) Use these, and the plot to compare the data. TheJay (2008) Back to Back, Retrieved April 19 2010, from:
http://www.brewcrewball.com/2008/8/9/590547/back-to-back-shutouts Interpreting Back-to-Back
Stem and Leaf plots Summary Statistics: Things we can compare? Skewness of data?
Averages?? (mean & median, & which is more appropriate)
Spread of data (use SD & IQR)
Try to write a concluding sentence! Practice:
Ex 10E, Page 518
Q 6 Comparison:
Because Liberal data is negatively skewed
we should use the median to represent the
average score.
Labor is symmetrical, so we could use either
the mean or median as the average.
Both data sets are 'spread' equally because
the Standard Deviation and the Inter-quartile
range are the same for Labor as it is for Liberal.
In summary, Liberal handed out more pamphlets than Labor (due to the average being larger.
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