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McGraw-Hill Math Grade 7 Answer Key Lesson 22.2 Stem-and-Leaf Plots
Exercises
INTERPRET
Question 1.
What is the range of the numbers represented in the stem-and-leaf plot below?
Answer:
Range = 80
Explanation:
A stem and leaf plot organizes data by the place value of digits.
It is named because it remained some people of a plant with stems,
each of which had a different number of leaves.
Range is the difference between,
First row Stem 9 Leaf 6,
Last row Stem 1 leaf 1.
So, the range of the numbers represented in the stem-and-leaf plot above,
96 – 16 = 80
Question 2.
Generate the number set represented by the stem-and-leaf plot below.
Answer:
10, 17, 19
21, 21, 23, 24,26, 27, 28
30, 31, 33, 35,36, 37, 37,
40, 41, 41, 41, 42
69
Explanation:
A stem and leaf plot organizes data by the place value of digits.
It is named because it remained some people of a plant with stems,
each of which had a different number of leaves.
numbers written as,
Frist row stem and leaf as written below up to last stem and last leaf.
10, 17, 19
21, 21, 23, 24,26, 27, 28
30, 31, 33, 35,36, 37, 37,
40, 41, 41, 41, 42
69
Question 3.
Generate the number set represented by the stem-and-leaf plot below.
Answer:
80, 85
71, 75, 76,
51, 56, 58,
40, 46
Explanation:
A stem and leaf plot organizes data by the place value of digits.
It is named because it remained some people of a plant with stems,
each of which had a different number of leaves.
numbers written as,
Frist row stem and leaf as written below up to last stem and last leaf
80, 85
71, 75, 76,
51, 56, 58,
40, 46.
Question 4.
What is the range of the numbers represented by the stem-and-leaf plot below?
Answer:
Range = 45
Explanation:
A stem and leaf plot organizes data by the place value of digits.
It is named because it remained some people of a plant with stems,
each of which had a different number of leaves.
Range is the difference between,
First row Stem 2 Leaf 2,
Last row Stem 6 leaf 7.
So, the range of the numbers represented in the stem-and-leaf plot above,
67 – 22 = 45.