McGraw Hill Math Grade 8 Lesson 24.2 Answer Key Stem-and-Leaf Plots

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Practice the questions of McGraw Hill Math Grade 8 Answer Key PDF Lesson 24.2 Stem-and-Leaf Plots to secure good marks & knowledge in the exams.

McGraw-Hill Math Grade 8 Answer Key Lesson 24.2 Stem-and-Leaf Plots

Exercises
INTERPRET
Question 1.
Make a list all of the points scored in the basketball games.
McGraw Hill Math Grade 8 Lesson 24.2 Answer Key Stem-and-Leaf Plots 1
Answer:
Points scored in the basketball games = 39, 40, 41, 45, 47, 47, 47, 47, 49, 52, 56, 56, 56.

Explanation:
Stem 3 leaves 9 = 39 points.
Stem 4 leaves 0,1,5,7,7,7,9 = 40,41,45,47,47,47,47,49 points.
Stem 5 leaves 2,6,6,6 = 52,56,56,56 points.

Question 2.
Make a list of the data shown below.
McGraw Hill Math Grade 8 Lesson 24.2 Answer Key Stem-and-Leaf Plots 2
Answer:
Points scored in the basketball games = 120, 125, 128, 128, 130,131, 132, 134, 136, 137, 139, 141, 142, 143, 145, 145, 149, 161, 165.

Explanation:
Stem 12 leaves 0,5,8,8 = 120, 125, 128, 128 points.
Stem 13 leaves 0,1,2,4,6,7,9 = 130,131, 132, 134, 136, 137, 139 points.
Stem 14 leaves 1,2,3,5,5,9 = 141, 142, 143, 145, 145, 149 points.
Stem 15 leaves no points.
Stem 16 leaves 1,5 = 161, 165 points.

Question 3.
Using the stem-and-leaf plot, determine the median age of people at the family reunion, the range, and the mode of the ages.
McGraw Hill Math Grade 8 Lesson 24.2 Answer Key Stem-and-Leaf Plots 3
Median ______________
Range _____________
Mode _____________
Answer:
Median = 35.5.
Range = 80.
Mode = no number repeating.

Explanation:
Stem 0 leaves 1, 8, 9 = 01, 08, 09.
Stem 3 leaves 2, 4, 7 = 32, 34, 37.
Stem 4 leaves 5 = 45.
Stem 5 leaves 1, 5 = 51, 55.
Stem 8 leaves 1 = 81.
Ages of people at Family Reunion = 1, 8, 9, 32, 34, 37, 45, 51, 55, 81.
Median = (34 + 37) ÷ 2
= 71 ÷ 2
= 35.5.
Range = 81 – 1 = 80.
Mode = no number repeating.

Question 4.
In a biology class, eight students collected shrubs for a study. The number of shrubs collected by the students was 4, 8,12,16, 21, 21, and 23. Make a stem-and-leaf plot of these numbers.
McGraw Hill Math Grade 8 Lesson 24.2 Answer Key Stem-and-Leaf Plots 4
Answer:
McGraw-Hill-Math-Grade-8-Answer-Key-Lesson-24.2-Stem-and-Leaf Plots-4

Explanation:
Number of students = 8.
Number of shrubs collected by the students was 4, 8,12,16, 21, 21, and 23.
Stem     Leaves
0            4  8
1            2  6
2            1  1  3

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