11a

1
1-1a
(over Lesson 1-6)
Slide 1 of 2
2
1-1b
(over Lesson 1-6)
Slide 1 of 2
3
1-1b
(over Lesson 1-6)
Slide 2 of 2
4
1-1b
(over Lesson 1-6)
Slide 2 of 2
5
Statistics Stem-and-Leaf Plots
Period 2 57 60 88 85 79 70 65 98 97 59 58 65 62
77 77 75 73 69 82 81
Stem
Leaf
Stem
Leaf
5 6 7 8 9
5 6 7 8 9
7
9
8
7 8 9
Key 7 9 means 79
0
5
9
2
5
0 2 5 5 9
9
0
7
7
3
5
0 3 5 7 7 9
8
5
2
1
1 2 5 8
8
7
7 8
6
EXAMPLEOrganize the following test scores into a
stem-and-leaf plot. 72, 69, 98, 77, 92, 85, 79,
86, 90, 98, 83, 100, 77, 98, 91
6 9 7 2 7 7 9 8 3 5 6 9 0 1 2 8 8 8
Stem Leaf
10 0 8 3 83
Since the data range from 69 to 100, the stems
range from 6 to 10. Plot each number by placing
the units digit (leaf) to the right of its
correct stem.
7
1-1a
Read the powerpoint notes for this page to the
class
Slide 1 of 2
8
1-2a
Slide 2 of 2
9
What is a Histogram? A Histogram is a variation
of a bar chart in which data values are grouped
together and put into different classes. This
grouping allows you see how frequently data in
each class occur in the data set.
10
Example of a Histogram
11
 Refer to the histogram showing the number of
people from each age group in Takala's Yoga
class. How many people in the class are from age
20-39?
12
vocabulary

• Line graph
• Histogram
• Cumulative frequency histograms
• Stem-and-leaf-plot