- 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?
- 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?

- 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

- 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