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HOMEWORK 1 Answer
EMA  3800/6808, Spring 2011
1.
Create a backtoback stemplot.
Distribution A is skewed to the left (the low numbers) and distribution B is skewed to the
right (the high numbers). Distribution B has the smallest value (20) of both distributions; it
also has the largest value (112). The average value of distribution A appears to be greater
than that of distribution B. Neither distribution has any outliers, and neither distribution has
gaps or clusters. Both distributions contain the same number of data values (54).
2.
First,enter the data into a list in the TI83/4 calculator. Sorting the numbers is not
necessary but allowed. Set up two plots, one boxplot and the other a histogram plot. Set
window parameters so both graphs are visible at the same time. Also calculate the mean,
standard deviation, and 5number summary.
The boxplot shows two outliers, 995 and 1210. The histogram, as well as the boxplot, shows
a skewed right distribution. Depending on the choice of class width, the histogram shows
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 Spring '10
 ElShall

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