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%