FREQUENCY TABLES LINE PLOTS HISTOGRAMS TERMS Frequency number

FREQUENCY TABLES, LINE PLOTS, & HISTOGRAMS

TERMS Frequency number of times that something happens **The key here is that frequency is always about the NUMBER of times Frequency table a table that shows the frequencies of items

EXAMPLE 1 A number cube was rolled 20 times. The results were: Make a frequency table of this data. 2 6 5 6 3 4 1 1 6 5 4 4 1 3 2 2 5 3

EXAMPLE 1 2 4 4 3 6 1 4 2 5 6 1 2 6 6 3 5 2 3 Number Tally Frequency 1 II 2 2 IIII 4 3 IIII 4 4 III 3 5 III 3 6 IIII 4

LINE PLOT To make a line plot: 1. Draw a number line that includes all the values (in example 1 this was 1, 2, 3, 4, 5, 6) 2. Place an “X” above each number to indicate the number of times it occurs.

Number Tally Frequency 1 II 2 2 IIII 4 3 IIII X X X X X 1 2 3 4 5 6 4 4 III 3 5 III 3 6 IIII 4

HISTOGRAM A graph that shows the frequencies of the data **Looks like a bar graph.

EXAMPLE 2 The number incorrect on the latest quiz in Mr. Marvel’s algebra class 4 1 7 0 10 5 2 3 2 2 1 1 9 1 3 1 0 4 8 4

EXAMPLE 2 4 1 7 0 10 2 5 3 2 2 1 1 9 1 3 1 0 4 8 4 1. Decide on an interval size (starts with 0 goes to 10) Interval size: 2

EXAMPLE 2 4 1 7 0 10 2 5 3 2 2 1 1 9 1 3 1 0 4 8 4 1. Decide on an interval size (starts with 0 goes to 10) Interval size: 2 2. Make a frequency table

EXAMPLE 2 4 7 1 0 10 2 5 3 2 2 1 1 9 1 3 1 0 4 8 4 Number Incorrect Tally Frequency 0– 1 IIII II 7 2– 3 IIII 5 4– 5 IIII 4 6– 7 I 1 8– 9 II 2 10 - 11 I 1

Number Incorrect Tally Frequency 0– 1 IIII II 7 2– 3 IIII 5 4– 5 IIII 4 6– 7 I 1 8– 9 II 2 10 - 11 I 1 Frequency for the Number Incorrect 5 Frequency 0– 1 2– 3 4– 5 6– 7 Number Incorrect 8– 9 10 - 11

Number Incorrect Tally Frequency 0– 1 IIII II 7 2– 3 IIII 5 4– 5 IIII 4 6– 7 I 1 8– 9 II 2 10 - 11 I 1 Frequency for the Number Incorrect 5 Frequency 0– 1 2– 3 4– 5 6– 7 Number Incorrect 8– 9 10 - 11

Number Incorrect Tally Frequency 0– 1 IIII II 7 2– 3 IIII 5 4– 5 IIII 4 6– 7 I 1 8– 9 II 2 10 - 11 I 1 Frequency for the Number Incorrect 5 Frequency 0– 1 2– 3 4– 5 6– 7 Number Incorrect 8– 9 10 - 11

Number Incorrect Tally Frequency 0– 1 IIII II 7 2– 3 IIII 5 4– 5 IIII 4 6– 7 I 1 8– 9 II 2 10 - 11 I 1 Frequency for the Number Incorrect 5 Frequency 0– 1 2– 3 4– 5 6– 7 Number Incorrect 8– 9 10 - 11

Number Incorrect Tally Frequency 0– 1 IIII II 7 2– 3 IIII 5 4– 5 IIII 4 6– 7 I 1 8– 9 II 2 10 - 11 I 1 Frequency for the Number Incorrect 5 Frequency 0– 1 2– 3 4– 5 6– 7 Number Incorrect 8– 9 10 - 11

Number Incorrect Tally Frequency 0– 1 IIII II 7 2– 3 IIII 5 4– 5 IIII 4 6– 7 I 1 8– 9 II 2 10 - 11 I 1 Frequency for the Number Incorrect 5 Frequency 0– 1 2– 3 4– 5 6– 7 Number Incorrect 8– 9 10 - 11

Number Incorrect Tally Frequency 0– 1 IIII II 7 2– 3 IIII 5 4– 5 IIII 4 6– 7 I 1 8– 9 II 2 10 - 11 I 1 Frequency for the Number Incorrect 5 Frequency 0– 1 2– 3 4– 5 6– 7 Number Incorrect 8– 9 10 - 11

Assignment 12. 1: 1 – 17, 20 - 23