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suter [353]
2 years ago
10

1. A teacher surveyed her class after they had taken a vocabulary test. Eighteen of the students claimed they had studied at lea

st one hour for the test. The remaining twelve students admitted that they had not studied for the test at all. The test results (expressed as a percent) for the two groups are shown below.
Studied: 87, 100, 94, 79, 92, 100, 95, 83, 89, 99, 100, 91, 89, 95, 100, 93, 96, 83
Did Not Study: 82, 72, 45, 91, 58, 83, 65, 87, 90, 77, 73, 89

What is the mean of the group that studied, rounded to the nearest tenth?



2. For the group that studied in Question #8...

Studied: 87, 100, 94, 79, 92, 100, 95, 83, 89, 99, 100, 91, 89, 95, 100, 93, 96, 83
Did Not Study: 82, 72, 45, 91, 58, 83, 65, 87, 90, 77, 73, 89

...what is the mean absolute deviation of the group, rounded to the nearest tenth?




3. How many of the scores (from the group that studied in Question #8)...

Studied: 87, 100, 94, 79, 92, 100, 95, 83, 89, 99, 100, 91, 89, 95, 100, 93, 96, 83
Did Not Study: 82, 72, 45, 91, 58, 83, 65, 87, 90, 77, 73, 89

...are within one mean absolute deviation of the mean? Which scores are within one mean absolute deviation of the mean? (Please show all work)



4. A teacher surveyed her class after they had taken a vocabulary test. Eighteen of the students claimed they had studied at least one hour for the test. The remaining twelve students admitted that they had not studied for the test at all. The test results (expressed as a percent) for the two groups are shown below.

Studied: 87, 100, 94, 79, 92, 100, 95, 83, 89, 99, 100, 91, 89, 95, 100, 93, 96, 83
Did Not Study: 82, 72, 45, 91, 58, 83, 65, 87, 90, 77, 73, 89

What is the mean of the group that did not study, rounded to the nearest tenth?





5. For the group that did not study in Question #11...

Studied: 87, 100, 94, 79, 92, 100, 95, 83, 89, 99, 100, 91, 89, 95, 100, 93, 96, 83
Did Not Study: 82, 72, 45, 91, 58, 83, 65, 87, 90, 77, 73, 89

...what is the mean absolute deviation of the group, rounded to the nearest tenth?



6. How many of the scores (from the group that did not study)...

Studied: 87, 100, 94, 79, 92, 100, 95, 83, 89, 99, 100, 91, 89, 95, 100, 93, 96, 83
Did Not Study: 82, 72, 45, 91, 58, 83, 65, 87, 90, 77, 73, 89

...are more than two mean absolute deviations from the mean? Which scores are more than two mean absolute deviations from the mean? (Please show all work)




AND WITH THE WRONG ANSWER WILL GET REPORTED ALSO WITH THE RIGHT ANSWER IS GETTING BRAINLIESS
Mathematics
2 answers:
ANEK [815]2 years ago
8 0

Answer:

1. studied: range-21

interquartile-10

did not: range-46

interquartile-19.5

2.The people who studied got closer grades to each other. This shows that those who didn't study had more variation in grades. So there if you don't study you have a bigger chance of failing than studying.

Step-by-step explanation:

i think this is the answer if wrong im sorry

GenaCL600 [577]2 years ago
6 0

Answer:

1. studied: range-21

                interquartile-10

  did not: range-46

               interquartile-19.5

2.The people who studied got closer grades to each other. This shows that those who didn't study had more variation in grades. So there if you don't study you have a bigger chance of failing than studying.

Step-by-step explanation:

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max2010maxim [7]

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Since our touchscreen starts off at a value of 1200, that will be our a variable.

Since the touchscreen is decaying in value by 25%, subtract 0.25 (25% in decimal form) from 1 to get 0.75. 0.75 is going to be your b variable.

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Trigonometry lesson. Find X and Y
noname [10]

Answer:

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Step-by-step explanation:

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Write an equation system based on the problem
"Agatha is five times older than her son, Bob" could be written as:
  a = 5b.......(first equation)
"Three years ago, she was nine times older" could be written as:
  a - 3 = 9(b - 3)......(second equation)

Solve the equation system
To find the value of b, substitute 5b as a to the second equation
a - 3 = 9(b - 3)
5b - 3 = 9(b - 3)
5b - 3 = 9b - 27
5b - 9b = -27 + 3
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a = 5b
a = 5 × 6
a = 30
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4 0
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