thinabby

24.08.2019 • 

Mathematics

Amanda surveyed 20 juniors and seniors at delamar high school to find the number of hours per week they spend working at part-time jobs. her results are shown below.
juniors: 20, 10, 20, 10, 15, 0, 0, 10, 20, 15
seniors: 20, 20, 10, 10, 0, 0, 0, 10, 0, 10
which statement about the data is true?
1.the range of hours worked is the same for juniors and seniors
2.the mean, medium,and mode for the juniors surveyed fall within a 3-hour range
3. the mean number of hours worked by the seniors surveyed is 12.
4. the mean number of hours worked is the same for junior and seniors.

Ответ:

zoestickle

05.04.2020

Mathematics

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Data set:
Junior: 0,0,10,10,10,15,15,20,20,20
mean: ((0x2)+(10x3)+(15x2)+(20x3))/10 = 30 + 30 + 60 /10 = 120/10 = 12
median: (10+15)/2 = 25/12 = 12.5
mode: 10, 20
range: 20 - 0 = 20

Senior: 0,0,0,0,10,10,10,10,20,20
mean: ((0x4)+(10x4)+(20x2))/10 = 40 + 40 / 10 = 80/10 = 8
median: (10+10)/2 = 20/2 = 10
mode: 0,10
range: 20 - 0 = 20

1.the range of hours worked is the same for juniors and seniors. It is 20.

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Ответ:

kellyzeissss4181

14.02.2023

Mathematics

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Closed circle on -1 and make it go to the right

Step-by-step explanation:

A trick that helps is that the line always goes in the direction that the arrow points to(but make sure the variable is on the left)

Also, whenever there is a line under the arrow its a closed circle and when there isnt a line under, its an open circle

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