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Exercise 1.4

1.
A standardized exam was given to two groups of people. The first group took the exam under adverse conditions, (room was too cold, room was dirty, proctor swore at them) while the second group took it under normal conditions. The data are given below. Determine the five basic statistics for the two groups, find the fences, and determine if there are any outliers. Then draw comparison boxplots for the two data sets. Are there any location differences? Scale differences?
Group1
153
150
132
123
148
146
140
154
137
112

Group2
148
113
69
129
150
129
157
184
143
167
141
179
124
130
166

2.
Consider Carrie's baseball data. Obtain back-to-back stem-leaf plots of the height of the hitters and pitchers. Discuss the plots.
3.
In the last problem, obtain the 5 basic descriptive statistics for the heights of the hitters and pitchers. Obtain the fences, and determine if there are any outliers. Then draw comparison boxplots for the two data sets. Are there any location differences? Scale differences?
4.
Ten batteries from each of three brands (A, B, and C) were put on test to determine their lifetimes (in hours). Obtain comparison dotplots. Use these dotplots to obtain the 5 basic descriptive statistics for each brand. Bigger means better here. Which brand seems best, if any?
A      B     C
 41     39     24
289     65     95
214     22    139
102     64    122
 38     22     41
 94    191    360
179     99    318
 87     32     34
116    142     43
155    317     18

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Next:Exercise 1.5Up:No TitlePrevious:Exercise 1.3
2000-08-26