### Percentage Grades Analysis Using Stem-and-Leaf PlotThe 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 ExplanationA 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#### AnalysisTo 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.

From box plot The data are given in percentage grade for Mr. Roger's students X: 49, 51, 65, 65, 66,…

Answered: The stem-and-leaf plot shows the…

MATLAB: An Introduction with Applications

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Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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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