University of West Georgia
Instructor: Dr. Ayona Chatterjee
Math 2063
Section: 2.2
Spring 2011
2.2 Graphs and Tables for Quantitative Data
EXAMPLE#1
The following data give the heights of a random sample of 30 National Basketball
Association players. Construct a frequency distribution and a relative frequency
distribution and use to draw a histogram, comment on the shape of the histogram. Also
construct a frequency polygon. Use five classes of equal widths.
76
85
74
81
79
80
81
79
83
84
72
83
79
75
73
79
81
78
77
82
82
84
80
84
82
85
75
82
77
83
University of West Georgia
Instructor: Dr. Ayona Chatterjee
Math 2063
Section: 2.2
Spring 2011
EXAMPLE# 2
Below is a list of amounts of Strontium-90 in a simple random sample of baby teeth
obtained from Pennsylvania residents born after 1979. Construct a dotplot of the amounts
of Strontium-90. What does the dotplot suggest about the distribution of those amounts?
Also construct a stem and leaf diagram for the given data.
155
128
114
170
142
144
165
129
148
172
169
188
130
137
145
156
151
151
150
163
166
150
151
148
150
142
163
158
156
145
151
133
116
145
138
136
152
161
158
140