Mathematics Middle School

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

Part 1: Calculate the mean of the group that did not study, rounded to the nearest tenth.

Part 2: Calculate the mean absolute deviation of the group that did not study, rounded to the nearest tenth.

Part 3: How many of the scores (from the group that did not study) are more than two mean absolute deviations from the mean?

Answers

Answer 1

Answer:

92.5

Step-by-step explanation:

1 is actually the mean of the group that did study is 92.5

2 is the MAD 5.2.

3is there are ten scores that are within the one MAD of the mean.

Answer 2

The answer would be 92.5

Related Questions

Choose Yes or No to tell if the operation will give an equivalent ratio for 8:20

Answers

Answer:

YES

Step-by-step explanation:

i believe it’s a Yes im sorry if it is wrong but i just think they are all a yes

please help me with this

Answers

The value of y should be 62

Hope this helps:)

The value of y is 62

Please help and explain how to do it if possible!! TYSM!

Answers

54%

Dude trust me. Lol

If a rectangle is inscribed in a circle, each diagonal also serves another function. What is this function?

Answers

Answer:

A right triangle inscribed in a circle must have its hypotenuse as the diameter of the circle.

Step-by-step explanation:

A rectangle is made of two right triangles then a rectangle inscribed in a circle must have its diagonal as the diameter of the circle. Hope this helps

The function of the diagnostic server as the diameter of the circle because the lines extend from one side to another equally

Sienna has 5 3/4 pounds of grapes. She eats 1/8 pound and gives 2 1/2 pounds to her brother. How many pounds of grapes does Sienna have left?

Answers

Answer:

Sienna has 5 3/4 pounds of grapes. She eats 1/8 pound and gives 2 1/2 pounds to her brother. How many pounds of grapes does Sienna have left?

Step-by-step explanation:

took the test

HELP smh shouldn't be hard i just wasn't paying attention and i will give brainlies for all correct answers

Answers

question 7: (3,4)
question 5: (1,2/3)
question 4: (-4,-6)

help pls!!!!!! im giving brainliest if you help.

Answers

A is FALSE
B is FALSE
C is FALSE
D is TRUE

Answer:

A. False

B. False

C. False

D. True

Pls help with 19 due in 15 mins

Answers

Answer:

the first question is 120. I cant see other options for the second question. The third question is 12.

Step-by-step explanation:

the answer for the first question is 120 sorry thats the only one I could figure out

I will mark with brainliest

Answers

Answer:

48√3

Step-by-step explanation:

24 x 2√3

48√3

Maria exercises for 2 3/8 hours every Saturday. She runs for 2/7 of the time she exercises. How much time does she spend running every Saturday? Write the answer in the simplest form.

will mark brainliest, NO WRONG ANSWERS PLS.

Answers

Answer:I think it's 1 5/14 hours. Hope I'm right!

Step-by-step explanation:

The variable in the equation 26 = 1 – 3r is r. Remembering the form ax + b = c, what are the values of the constants, a, b, and c in the equation?

Answers

The value of the constant a, b and c in the equation are -3, 1 and 26 respectively.

What is variable?

Variable are numbers represented by letters in a mathematical equation. Therefore,

26 = 1 - 3r

Using the form ax + b = c, where a, b and c are constant.

The value of a, b and c in the expression 26 = 1 - 3r can be solve as follows:

-3r + 1 = 26

Therefore,

a = -3b = 1c = 26

learn more on variable here: https://brainly.com/question/12035180

Answer:

A=-3

B=1

C=26

Step-by-step explanation:

i dont know the answer can someone help me

Answers

The answer is 2
Have an amazing day

Select the correct choice below and, if necessary, fill in the answer box to complete your choice.

Answers

Answer:

5/6

Step-by-step explanation:

Slope equals y 2 minus y 1 divided by x 2 minus x1

1-(-4)/4-(-2)

5/6

It 5/6 hope it helps you

A farm has chickens and cows. All the cows have 4 legs and all the chickens have 2 legs. Altogether, there are 82 cow and chicken legs on the farm. Complete the table to show some possible combinations of chickens and cows to get 82 total legs.

Answers

7 / 17

21 / 10

19 / 11

5 / 31

Pls help it’s my homework

Answers

Math-way and Math Calcs can help! I fail to do all of these in my mind

use a calculator it gives u the exact answer x

Prove that the median to the base of an isosceles triangle is also: the altitude to the base.
Also, Prove that the median to the base of an isosceles triangle is also: the angle bisector of the angle from which it is drawn.

Please provide statement and reason proof. Would really appreciate it. Best Answer will get brainliest, and please don't spam stuff just for points. Thanks, and have a great day!

Answers

Hey there!

The base angles theorem converse states if two angles in a triangle are congruent, then the sides opposite those angles are also congruent. The Isosceles Triangle Theorem states that the perpendicular bisector of the base of an isosceles triangle is also the angle bisector of the vertex angle.

Let me know if you are still confused and need a better explination :)

Have a great day!

Answer:

Step-by-step explanation:

PLS PLS PLS HELP I WILL MARK BRAINLIEST !!!!!!!!!!!!!!

Answers

Answer:

tough question eh ima guess b and a

Step-by-step explanation:

Answer:

14:C 15:-2.5,3 16:B

Step-by-step explanation:

( basic geometry) This is easy I just want to make sure my answer is right. part 3

Answers

Answer:

Step-by-step explanation:

B if you subtract both numbers from 180 you will get 35 and similar triangles have the same angle measures. so they are 80 65 and 35

I believe that the answer to this problem would be B

Which expression shows another way to find the volume of this prism?

Answers

Answer:

it would be the second answer

Step-by-step explanation:

To find volume, you have to multiply all the side lengths together.

the second answer choice
To find volume u would have to multiply length x width x height

What is the relationship between <8 and <4? Select the TWO answers that apply. *pleasee helpp*

Answers

i know for sure they are same side interior!!

same side interior, supplementary

PLS PLS PLS HELP I WILL GIVE BRAINLIEST!

Answers

Answer:

A:6,2

Step-by-step explanation:

plz mark me as the brainliest

Answer:

(6, -6)

Step-by-step explanation:

add or subtract the cordinates

please I need help with this question

Answers

Answer:

1. No

2. No

3. No

4. No

Step-by-step explanation:

y=2 so you multiply your x by 2 and you should come out with your y

your y should be 1 * 2 = 2 but is 9 ---->for (1, 9)

your y should be -6 * 2 = -12 but is 2 ---->for (-6, 2)

your y should be 2 * 2 = 4 but is -8 ----->for (2, -8)

your y should be 0 * 2 = 0 but is -4 ----> ( 0, -4)

side note -I'm sorry if you get it wrong,hopefully it's right though.

PLS PLS PLS HELP I WILL MARK BRAINLIEST!!!
Cells exchange materials with the environment around them. What is the main reason for this?
Group of answer choices

A) to replace damaged and dying cells

B) to keep the cell membrane functioning

C) to release energy into the environment

D) to get rid of wastes and take in nutrients

Answers

Answer:

C, to realease energy into the environment

Step-by-step explanation:

Hope this helps :)

The reason is to release energy into the environment.

the correct option is (C)

What is cell?

Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions

As, Exchange of substances between a cell and its environment is mediated through osmosis, active transport and diffusion.

Osmosis is the process of diffusion of molecules from the region of higher concentration to the lower concentration through a semipermeable membrane. The cells absorb water by the process of endosmosis from its surrounding and water exits by the process of exosmosis.

Cells need to move water, materials for energy, waste materials, and other molecules across the cell membrane to help maintain homeostasis.

Also, to release energy into the environment.

Learn more about cell here:

https://brainly.com/question/3142913

#SPJ2

please help! the picture is below

Answers

B. 2/9
To find the rate of change you do x2-x1/y2-y1 (5-3)/(22.50-13.50)

pls help it's a redo assignment
a. 2 1/2 x 3 1/3
b. 4/9 x 2 1/4
c 3 1/4 x 1 1/2
d. 7 1/5 x 1 1/3
e 6 1/3 x 1/2
f 4 1/5x 20
g 3 x 2 2/3
h 2 5/6 x 1 3/5
i 15 x 1 1/3

Answers

Answer:

a) 8 1/3 b) 1 c) 4 7/8 d) 9 3/5 e) 3 1/6 f) 84 g) 8 h) 4 8/15 i) 20

Step-by-step explanation:

Just trust me

help me, please eeeeeeeeeeeeeeeeeeee

Answers

Answer:

[tex]2x - 1 \geqslant 0[/tex]

Step-by-step explanation:

X going to the positive direction from 0 or bigger than 0 to

[tex] \infty [/tex]

x = 0.5

2(0.5) - 1 = 0 = 0

x = 1

2(1) - 1 = 1 > 0

x = 2

2(2) -2 = 2 > 0

and so on...

Answer:

Step-by-step explanation:

The Wilson Park Pool has 80,000 gallons of water that is being drained at a rate of 4000 gallons per day. How many days has the pool been draining if the water level is at 68,000 gallons?

Answers

Answer:

3 days

Step-by-step explanation:

Since the Wilson Park Pool has been drained 4,000 gallons every day, for 3 days, it would be drained 12,000 gallons already, 80,000 - 12,000 = 68,000

418 minues what equals 19

Answers

Answer:

437-418=19

Step-by-step explanation:

418+19=437

418-399=19

Step-by-step explanation:

CAN SOMEONE PLZ PUT THIS EQUATION IN SLOPE INTERCEPT FORM AND EXPLAINN
U WILL GET BRAINLIEST

-1x+1y=1x-5

Answers

I believe the answer is y=2x−5 Im not quiet sure

Answer:

y=2x-5

Step-by-step explanation:

Slope intercept from has 4 parts, a y, an x, an m, (slope in front of x) and a b (y-int).

We must first isolate the 1y to the front of the equation by adding 1x to each side.

This gives us our final answer of (1) y = 2x-5

We have a Y and X, and our m (slope) is 2 and b (y-intercept )is -5

asap help ill give brainlist

Answers

Answer:

D) 8

Step-by-step explanation:

12 times 2= 24

24 plus 8 = 32

32 divided by 4

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