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The stem-and-leaf plot shows the percentage grades for Mr. Roger's students. How many students scored less than 80%? ▸ Stem Leaf 49 5 1 6 5, 5, 6, 8, 9 7 5, 6, 6, 7, 8 8 9 10 0,0 2,8,9 1,2,2 Key: 419 = 49 Oll 0

The stem-and-leaf plot shows the percentage grades for Mr. Roger's students. How many students scored less than 80%? ▸ Stem Leaf 49 5 1 6 5, 5, 6, 8, 9 7 5, 6, 6, 7, 8 8 9 10 0,0 2,8,9 1,2,2 Key: 419 = 49 Oll 0

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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### Percentage Grades Analysis Using Stem-and-Leaf Plot The following stem-and-leaf plot displays the percentage grades obtained by Mr. Roger's students. **Question**: How many students scored less than 80%? #### Stem-and-Leaf Plot Explanation A stem-and-leaf plot is a method used to display quantitative data where each number is split into a stem (the first part of the number) and a leaf (the last part of the number). In this plot: - The "Stem" represents the tens digit. - The "Leaf" represents the units digit. For example, if the "Stem" is 4 and the "Leaf" is 9, the combined number is 49. #### Data **Stem | Leaf** ``` 4 | 9 5 | 1 6 | 5, 5, 6, 8, 9 7 | 5, 6, 7, 8 8 | 2, 8, 9 9 | 1, 2, 2 10 | 0, 0 ``` **Key**: 4|9 = 49 #### Analysis To determine how many students scored less than 80%, observe the entries where the "Stem" is 7 or lower, because these represent scores in the 70s or below. - Stem 4: 49 (1 student) - Stem 5: 51 (1 student) - Stem 6: 65, 65, 66, 68, 69 (5 students) - Stem 7: 75, 76, 77, 78 (4 students) Summing up the counts: - Total: 1 (stem 4) + 1 (stem 5) + 5 (stem 6) + 4 (stem 7) = **11 students** **Conclusion**: 11 students scored less than 80% in Mr. Roger's class.
Transcribed Image Text:### Percentage Grades Analysis Using Stem-and-Leaf Plot The following stem-and-leaf plot displays the percentage grades obtained by Mr. Roger's students. **Question**: How many students scored less than 80%? #### Stem-and-Leaf Plot Explanation A stem-and-leaf plot is a method used to display quantitative data where each number is split into a stem (the first part of the number) and a leaf (the last part of the number). In this plot: - The "Stem" represents the tens digit. - The "Leaf" represents the units digit. For example, if the "Stem" is 4 and the "Leaf" is 9, the combined number is 49. #### Data **Stem | Leaf** ``` 4 | 9 5 | 1 6 | 5, 5, 6, 8, 9 7 | 5, 6, 7, 8 8 | 2, 8, 9 9 | 1, 2, 2 10 | 0, 0 ``` **Key**: 4|9 = 49 #### Analysis To determine how many students scored less than 80%, observe the entries where the "Stem" is 7 or lower, because these represent scores in the 70s or below. - Stem 4: 49 (1 student) - Stem 5: 51 (1 student) - Stem 6: 65, 65, 66, 68, 69 (5 students) - Stem 7: 75, 76, 77, 78 (4 students) Summing up the counts: - Total: 1 (stem 4) + 1 (stem 5) + 5 (stem 6) + 4 (stem 7) = **11 students** **Conclusion**: 11 students scored less than 80% in Mr. Roger's class.
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