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Janet surveyed a class or students she recorded the number of hours that each student volunteered this line plot shows the results of the survey

Janet surveyed a class or students she recorded the number of hours that each student volunteered this line plot shows the results of the survey class=

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TheStranger

Answer:

Part A: 20 students

Part B: 4 hours

Step-by-step explanation:

Part A:

To find the number of students surveyed, we count the number of x there are in the graph.

students = 1 + 2 + 3 + 5 + 1 + 1 + 3 + 2 + 2 = 20

Part B:

To find the mean, we need to find the total number of hours volunteered first.

hours = 1x0 + 2x1 + 3x3 + 5x3 + 1x4 + 1x5 + 3x6 + 2x7 + 2x8 = 80

Now, we can find the mean. We divide the total number of hours volunteered by the number of students.

Mean = 80 ÷ 20 = 4

Janet surveyed a class of students she recorded the number of hours that each student volunteered this line plot shows the results of the survey Part A: 20 students and Part B: 4 hours.

What are mean?

The mean is the average value which can be calculated by dividing the sum of observations by the number of observations

Mean = Sum of observations/the number of observations

Part A

We want to find the number of students surveyed and we count the number of x there are in the graph.

Students = [tex]1 + 2 + 3 + 5 + 1 + 1 + 3 + 2 + 2[/tex]

              = 20

Part B:

We want to find the mean, we need to find the total number of hours volunteered first.

Number of hours

[tex]1 \times 0 + 2\times1 + 3\times3 + 5\times3 + 1\times4 + 1\times5 + 3\times6 + 2\times7 + 2\times8\\ \\= 80[/tex]

Now, we can find the mean.

Mean=

= [tex]\frac{80} {20} \\\\ 4[/tex]

Learn more about mean;

https://brainly.com/question/17060266

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