frequency tables, line plots, & histograms. terms frequency number of times that something...
TRANSCRIPT
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
3 2 2 5 3
EXAMPLE 1
2 6 5 6 3
4 1 6 6 5
4 4 1 3 2
3 2 2 5 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 4
4 III 3
5 III 3
6 IIII 4
1 2 3 4 5 6
XX
XXXX
XXXX
XXX
XXX
XXXX
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 10 5 2 2 1 1 9 1
7 0 2 3 3 1 0 4 8 4
EXAMPLE 2
4 1 10 5 2 2 1 1 9 1
7 0 2 3 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 10 5 2 2 1 1 9 17 0 2 3 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
Number
IncorrectTally 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
4 1 10 5 2 2 1 1 9 17 0 2 3 3 1 0 4 8 4
Number
IncorrectTally 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
5
0 – 1 2 – 3 4 – 5 6 – 7 8 – 9 10 - 11
Number Incorrect
Frequency
Frequency for the Number Incorrect
Number
IncorrectTally 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
5
0 – 1 2 – 3 4 – 5 6 – 7 8 – 9 10 - 11
Number Incorrect
Frequency
Frequency for the Number Incorrect
Number
IncorrectTally 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
5
0 – 1 2 – 3 4 – 5 6 – 7 8 – 9 10 - 11
Number Incorrect
Frequency
Frequency for the Number Incorrect
Number
IncorrectTally 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
5
0 – 1 2 – 3 4 – 5 6 – 7 8 – 9 10 - 11
Number Incorrect
Frequency
Frequency for the Number Incorrect
Number
IncorrectTally 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
5
0 – 1 2 – 3 4 – 5 6 – 7 8 – 9 10 - 11
Number Incorrect
Frequency
Frequency for the Number Incorrect
Number
IncorrectTally 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
5
0 – 1 2 – 3 4 – 5 6 – 7 8 – 9 10 - 11
Number Incorrect
Frequency
Frequency for the Number Incorrect
Number
IncorrectTally 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
5
0 – 1 2 – 3 4 – 5 6 – 7 8 – 9 10 - 11
Number Incorrect
Frequency
Frequency for the Number Incorrect
Assignment
12.1: 1 – 17, 20 - 23