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2.1 Data Analysis with Graphs
CONTINUED
p. 102 #9 abc
a) Construct a frequency distribution table
Range =
Interval Size =
Speed Tally Frequency
b) Construct a histogram and frequency polygon
b) Construct a cumulative frequency diagram
• CUMULATIVE FREQUENCY –
Speed Tally Frequency Cumulative
Frequency
65.5-70.5 4 4
70.5-75.5 8 12
75.5-80.5 7
80.5-85.5 2
85.5-90.5 1
90.5-95.5 1
95.5-100.5 1
Cumulative frequency diagram
• RELATIVE FREQUENCY
Speed Tally Freq. Cumulative
Frequency
Relative Frequency
65.5-70.5 4 4 4/24 =
70.5-75.5 8 12 8/24 =
75.5-80.5 7 19
80.5-85.5 2 21
85.5-90.5 1 22
90.5-95.5 1 23
95.5-100.5 1 24
Ex. 2 Consider the following heights
a) Construct a frequency distribution table
b) Construct a histogram, cumulative frequency diagram, and relative frequency diagram
207 186 178 204 172
183 183 174 212 178
189 183 184 190 184
168 190 180 183 190
187 204 185 206 175
185 162 200 206 196
Height Tally Freq Cumulative Frequency
Relative Frequency
a) Frequency Table
b) HISTOGRAM
b) CUMULATIVE FREQUENCY DIAGRAM
b) RELATIVE FREQUENCY DIAGRAM
CATEGORICAL DATA
To create a circle graph:
• Ex. Favorite foodspizza 38% chocolate 15 % ice cream 25%french fries 22%