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DOT PLOTS. DEFINITION. A data display in which each data item is shown as a dot above a number line In a dot plot a cluster shows where a group of data points fall. A gap is an interval where there are no data items. HOW TO MAKE A DOT PLOT VIDEO. STEPS TO CREATE A DOT PLOT. - PowerPoint PPT Presentation
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DOT PLOTS
DEFINITION
A data display in which each data item is shown as a dot above a number line
In a dot plot a cluster shows where a group of data points fall.
A gap is an interval where there are no data items.
HOW TO MAKE A DOT PLOT VIDEO
STEPS TO CREATE A DOT PLOT
1. Order numbers from least to greatest.2. Draw a number line.3. Label the number line with the minimum
and the maximum then all the numbers that fall between them.
4. Put a dot above each number on the number line for each data entry in your set.
5. Don’t forget a title and labels!
YOU TRY IT!
A. In an airline training program, the students are given a test in which they are given a set of tasks and the time it takes them to complete the tasks is measured. The following is a list of the time (in seconds) for a group of new trainees.
61, 61, 64, 67, 70, 71, 71, 71, 72, 73, 74, 74, 75, 77,
79, 80, 81, 81, 83
Display the data in a dot plot.
ANSWER!
Airline Training Program TestNew Trainees
= 1 person
Time in Seconds
61
83
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
ARE THERE ANY CLUSTERS?
Airline Training Program TestNew Trainees
= 1 person
Time in Seconds
61
83
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
Yes!
ARE THERE ANY GAPS?
Airline Training Program TestNew Trainees
= 1 person
Time in Seconds
61
83
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
Yes!
WHAT IS THE AVERAGE TIME?
Airline Training Program TestNew Trainees
= 1 person
Time in Seconds
61
83
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
About 73 seconds
WHAT IS THE MEDIAN TIME?
Airline Training Program TestNew Trainees
= 1 person
Time in Seconds
61
83
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
73 seconds
WHAT IS THE MODE?
Airline Training Program TestNew Trainees
= 1 person
Time in Seconds
61
83
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
71 seconds
WHAT IS THE RANGE?
Airline Training Program TestNew Trainees
= 1 person
Time in Seconds
61
83
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
22 seconds
WHAT DOES THE MEDIAN REPRESENT?
Airline Training Program TestNew Trainees
= 1 person
Time in Seconds
61
83
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
The center of the data set.
WHAT DOES THE RANGE REPRESENT?
Airline Training Program TestNew Trainees
= 1 person
Time in Seconds
61
83
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
The variation in the data
set.
TRY AGAIN!
B. In a science class, the students weighed some samples of dirt to the nearest 1/8 pound. The weights of the samples are given below.
1/8 lb, 3/8 lb, ¾ lb, ¼ lb, 1/8 lb, ¼ lb, 7/8 lb, ¼ lb, 3/8 lb, ¼ lb, ½ lb, 3/8 lb
Make a dot plot for the data.
ANSWER!
Sample Weights
= 1 sample
Weight in pounds
0 18
28
38
48
58
68
78
1
ARE THERE ANY CLUSTERS?
Sample Weights
= 1 sample
Weight in pounds
0 18
28
38
48
58
68
78
1
Yes!
ARE THERE ANY GAPS?
Sample Weights
= 1 sample
Weight in pounds
0 18
28
38
48
58
68
78
1
Yes!
WHAT IS THE AVERAGE WEIGHT?
Sample Weights
= 1 sample
Weight in pounds
0 18
28
38
48
58
68
78
1
3/8 or 0.375 lb
WHAT IS THE MEDIAN?
Sample Weights
= 1 sample
Weight in pounds
0 18
28
38
48
58
68
78
1
5/16 or 0.3125 lb
WHAT IS THE MODE?
Sample Weights
= 1 sample
Weight in pounds
0 18
28
38
48
58
68
78
1
2/8 or 1/4 lb
WHAT IS THE RANGE?
Sample Weights
= 1 sample
Weight in pounds
0 18
28
38
48
58
68
78
1
6/8 or 0.75 lb
WHAT DOES THE AVERAGE REPRESENT?
Sample Weights
= 1 sample
Weight in pounds
0 18
28
38
48
58
68
78
1
The center of the data set.
WHAT DOES THE RANGE REPRESENT?
Sample Weights
= 1 sample
Weight in pounds
0 18
28
38
48
58
68
78
1
The variation in the data set.
EXIT SLIP!
Mrs. Whitesides took a survey of ten 6th grade students. She asked each student how many items they recycle in a day. Below are her results.
0, 1, 1, 1, 2, 2, 2, 3, 3, 5
Make a dot plot to display this data.
