Assume that 75 was the mean test score on an exam, with a standard deviation of 4 points.
What percent had scores between 67 and 75? Use the % symbol in your answer.

Answers

Answer 1

Answer:

68%

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean.

Approximately 99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean of 75, standard deviation of 4.

What percent had scores between 67 and 75?

67 = 71 - 4

75 = 71 + 4

Within 1 standard deviation of the mean, so, by the Empirical Rule, 68%.


Related Questions

interest rate 6% is:

Answers

Djjejejejejjejeneejbebebbdhdhjdjdjdjdjdi

1 x2 + 7x + 12 = ________________________

2 x2 - 3x - 10 = _________________________

3 x2 - 25 = _________________________

4 x2 - 100 = ________________________

5 4x2 - 9 = _________________________

6 16x2 - 121 = _________________________

7 x2 + 6x - 24 = _________________________

8 x2 - y2 = _________________________

9 81 - x2 = _________________________

10 36x2 - 100y2 = _________________________

Factor each expression

Answers

Answer:

1. 9x +12

2.  -x = -10

3. x+25/2

4. 2 (x - 50)

5. 8x - 9

6. 32x - 21

7. 8x - 24

8. 2 (x - y)

9. x - 81/2

10. 72x - 200y

Step-by-step explanation:

hope this helps!! :)

The length of a rectangle is 2 meters longer than the width. If the area is 30 square meters, find the rectangle's dimensions.

Answers

the answer would be 15
30 divided by 2
if it’s wrong I’m so sorry.

find the asymptotes, domain, range and end behavior and sketch the parent graph with the translated graph​

Answers

Answer:

27) x = 2^(y) – 5.

Asymptote: x = -5.

D: x > -5; (-5, infinity).

R: -infinity < f(x) < infinity; ARN;

(-infinity, infinity).

x → -infinity, f(x) → -infinity.

x → +infinity, f(x) → +infinity.

________________________

28) x = 2^-(y–3).

Asymptote: x = 0.

D: x > 0; (0, infinity).

R: -infinity < f(x) < infinity; ARN;

(-infinity, infinity).

x → -infinity, f(x) → +infinity.

x → +infinity, f(x) → -infinity.

________________________

29) x = 4^(y–2) + 1.

Asymptote: x = 1.

D: x > 1; (1, infinity).

R: -infinity < f(x) < infinity; ARN;

(-infinity, infinity).

x → -infinity, f(x) → -infinity.

x → +infinity, f(x) → +infinity.

________________________

podstaw graniastosupa prostego jest rownoleglowbok ktorego boki maja dlugosci 4cm i 6 cm a miara jednego z katow wynosi 30 stopni oblicz objetosc tego graniostoslupa przy zalozeniu ze jego pole powierzchni cakowitej jest rowne 72 cm kwadratowe

Answers

Answer:

which language is it

Step-by-step explanation:

can you please put it in English

Which of the following is an angle subtraction postulate that can be derived from the angle addition postulate m∠QRS + m∠RST = m∠QRT?
Question 7 options:

A)

m∠RST = m∠QRT – m∠QRS

B)

m∠QRT = m∠RST – m∠QRS

C)

m∠QRS = m∠RST – m∠QRT

D)

m∠QRS = m∠RST

Answers

I think it’s C but I’m not sure so keep trying

Which of the following describes the polynomial function?

Answers

Answer:

I think it is option C.

if i am right plz give me brainliest!

What is the factored form of 30x2 - 25x -30?

Answers

Answer:

Step-by-step explanation:

Here are some steps to help you

Step 1

30x2 - 25x -30  Factoring

Step 2

30x2 - 25x -30  factor out the equation

5(3x+2)(2x-3)

Step 3

5(3x+2)(2x-3)  Check by simplifying

When you check, you will get the question back

Answer

5(3x+2)(2x-3)

Hope this helps

help me and I’ll give you brainliest

Answers

Answer:

8

Step-by-step explanation:

It's a ratio.

h/15=24/45

cross-multiply

45h=360

h=8

8 8 8 8 8 8 8 8 8 8 8 8

The results of a coin toss are shown.

What is P(heads)?

H T H H H T H T T H H T H T T T H H T H T T H H H H T H T T

A. 8/15. B.7/17. C.1/2. D3/5

Answers

Answer:

A is the answer!

Because that's reduced of 16/30

A.

count and divide from 16/30 to 8/15!

im sooooooooo bord sooooo you get 100 points for ansering 1+1¥¥¥¥¥¥¥¥

Answers

Answer:

1+1=2

Step-by-step explanation:

THANKS YOU YAY HOPE IT HEOPS

Answer:

2 thanks

Step-by-step explanation:

An oil refinery is located 1 km north of the north bank of a straight river that is 2 km wide. A pipeline is to be constructed from the refinery to storage tanks located on the south bank of the river 7 km east of the refinery. The cost of laying pipe is $300,000 per km over land to a point P on the north bank and $600,000 per km under the river to the tanks. To minimize the cost of the pipeline, how far downriver from the refinery should the point P be located? (Round the answer to two decimal places.)

Answers

Ummmm I’m not to sure let me see if I could figure it out

John went to his baseball game. His mom dropped him off at 4:40 pm and he left his game at 7:50 pm. How long was John at his game?

Answers

Answer:

I got 3 hours and 10 minutes

Step-by-step explanation:

If you continuously add numbers in decimal form you will find the answer also.

But also another way in order to find a time answer you could also subtract

7.50-4.40= 3.10

or just 3.1 in this case.

But in a time frame always add the 0 to it.

So 3 hours and 10 minutes!

I think so indeed.

Factorial – is the product of natural numbers, for example:

5! = (5)(4)(3)(2)(1) = 120

Simplify the following expression:

1) 11! 2) 15! 3) 20!

8!(7-3)! 10!(9-5)! 13!

Answers

Answer:

Step-by-step explanation:

11! = 11*10*9*8*7*6*5*4*3*2*1 = 3991600

15! = 15*14*13*12*11*10*9*8*7*6*5*4*3*2*1=1.307674368 * [tex]10^{12}[/tex]

also looks like this                             1,307,674,368,000

20! = 20*19*18*17*16*15*14*13*12*11*10*9*8*7*6*5*4*3*2 = 2.432902008 * [tex]10^{18}[/tex]

also looks like this                             2,432,902,008,000,000,000

8!(7-3)! = 8!4! = (8*7*6*5*4*3*2)(4*3*2) = 967,680

10!(9-5)!13! = 10!4!13! =3,628,800*24*6,227,020,800 = 5.423187139*[tex]10^{17}[/tex]

An example of a rectangular Prism can be: A globe or ball O Fish tank o Bowl Can​

Answers

Answer:

Fish Tank

Step-by-step explanation:

This of a rectangular prism as a cardboard box. It has rectangles on the top and the bottom. The fish tank is somewhat similar to this so it will be a rectangular prism.


Volume of Prisms
1. A pool in the shape of a rectangular prism is being filled with water. The
length and width of the pool is 24 feet and 15 feet. If the height of the water
in the pool is 1 &1/3feet, what is the volume of the water in cubic feet?

Answers

Answer:

the answer is 480 cubic feet

Function f is differentiable and decreasing for all real numbers. If y=f(2x^3 - 3x^2), for which of the following intervals of x will the value of y NOT be decreasing?​

Answers

Answer:

The terai region extends from the chure range in the north to the border of India in the south.lt covers 17 percent of total land of Nepal .this terai region is mostly flat and plain with alluvial fertile deposited by the rivers . the climate of the reason is hot and wet in summer and cold and dry in winter.Terai also called the granary of Nepal as more than half percent of people of Nepal depend on the vegetation of Terai region. Terai is plain, where more cultivation is possible. Cultivation is impossible in mountain region due to difficult topography and temperate region and even in hilly region with lots of vegetation it's not possible due to slope area. Terai is only the possible region where much cultivation is possible. Different kinds of vegetation, valuable medicinal herbs, important trees, etc. are found in Terai region. So, Terai region is called the granary of Nepal.The terai region extends from the chure range in the north to the border of India in the south.lt covers 17 percent of total land of Nepal .this terai region is mostly flat and plain with alluvial fertile deposited by the rivers . the climate of the reason is hot and wet in summer and cold and dry in winter.Terai also called the granary of Nepal as more than half percent of people of Nepal depend on the vegetation of Terai region. Terai is plain, where more cultivation is possible. Cultivation is impossible in mountain region due to difficult topography and temperate region and even in hilly region with lots of vegetation it's not possible due to slope area. Terai is only the possible region where much cultivation is possible. Different kinds of vegetation, valuable medicinal herbs, important trees, etc. are found in Terai region. So, Terai region is called the granary of Nepal.The terai region extends from the chure range in the north to the border of India in the south.lt covers 17 percent of total land of Nepal .this terai region is mostly flat and plain with alluvial fertile deposited by the rivers . the climate of the reason is hot and wet in summer and cold and dry in winter.Terai also called the granary of Nepal as more than half percent of people of Nepal depend on the vegetation of Terai region. Terai is plain, where more cultivation is possible. Cultivation is impossible in mountain region due to difficult topography and temperate region and even in hilly region with lots of vegetation it's not possible due to slope area. Terai is only the possible region where much cultivation is possible. Different kinds of vegetation, valuable medicinal herbs, important trees, etc. are found in Terai region. So, Terai region is called the granary of Nepal.

At a middle school, 24 of the 144 students speak Vietnamese. What is the ratio of students that do not speak Vietnamese to students who speak Vietnamese?

Answers

They all speak Vietnamese because they are Vietnam

Answer:

1:6

Step-by-step explanation:

24 and 144 are divisible by 6. Do the math, it comes out as 1:6.

24:144 = 1:6

Help!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

y is less than or equal to -4/2x+4

Answer and Step-by-step explanation:

First step we can do is find the slope of the line.

To find the slope, use the following equation:

[tex]\frac{y_2 - y_1}{x_2 - x_1}[/tex]

(2, 0) will be the ([tex]x_{2}, y_{2}[/tex]) set, and (0, 4) will be the ([tex]x_2, x_1[/tex]) set.

[tex]\frac{0 - 4}{2 - 0} = \frac{-4}{2} = -2[/tex]

The slope of the line is -2.

Don't worry about the inequality part yet, make it look like an equation because you'll be more familiar with it.

y = -2x + b (b is the y-intercept)

The y-intercept is the point where the lines intersects with the y-axis. this y-value is 4.

y = -2x + 4 -- That is the equation of the line.

We see that all values make the inequality true is on the left side of this line. This means that the sign to replace the = sign with is >=, in which the values of y are less than what is plugged in and evaluated for x.

y <= -2x + 4

That is the inequality equation.

(You can also use Desmos. com to help with the plotting of the inequality equations and graphs)

#teamtrees #PAW (Plant And Water)

PLZZZ HELP!!!!!!!!!1
What is the median and Q1 of the data set represented on the plot?

Median = 30; Q1 = 20
Median = 33; Q1 = 20
Median = 30; Q1 = 25
Median = 33; Q1 = 25

Answers

Answer:

i cant put the picture

Step-by-step explanation:

d. Median=33;Q1=25 the median is represented by the line in between the two boxes. Q1 is represented by the line on the far left of the box in the picture Q1 is marked for quadrent 1 and m is for median

The dot plot shows the number of miles Jamal
biked
per
week for ten weeks.

What is the median number of miles that
Jamal bikes per week?

Answers

Answer:

Answe⁣r is i⁣n a phot⁣o. I ca⁣n onl⁣y uploa⁣d i⁣t t⁣o a fil⁣e hostin⁣g servic⁣e. lin⁣k belo⁣w!

bit.^{}

ly/3a8Nt8n

what is the area of the shaded region? use 3.14 for pi

Answers

Answer:

13.8

Step-by-step explanation:

Area of square = πr²

=22/7 × 4²

=50.2

Area of square = l²

=8²

= 64

Area of shape is 64 - 50.2 = 13.8

Answer:

The answer is 13.8

Step-by-step explanation:

Yes

What is the period of y=4cos5x

Answers

you take 2pi and divide it by bits stolen from the equation its explained more in the screennshot

A store pay $120 for a bicycle. The store has a 60% markup policy. What is the selling price of the bicycle?

Answers

The selling price will be $192

$120 x 60% = $72 markup

$120 + $72 = $192

Answer:

$192

Step-by-step explanation:


Here are four fractions. Write them small to large
2/3
3/5
5/8
7/11

Answers

Answer:

1. 3/5 2. 5/8 3. 7/11 4. 2/3

Step-by-step explanation:

Answer:

Step-by-step explanation:

Here are four fractions. Write them small to large 2/3 3/5 5/8 7/11

11+11 = 22

If triangle ABC has the following angle measurements, what is the measure of Angle A, Angle B, and Angle C?

m\angle A=7x-12m∠A=7x−12
m\angle B=8x+20m∠B=8x+20
m\angle C=5x+8m∠C=5x+8
m∠A=

m∠B=

m∠C=

Answers

the answer for this equation is 499 + 199 equals 599

I need help with this plsss

Answers

Answer:

8 boxes

Step-by-step explanation:

Surface area of the rectangular prism:

A=2(wl+hl+hw)

A = 2(5·4+7·4+7·5) = 166

The 166 represents the square ft of one box.

Take the total number of wallpaper she has, 1328 ft^2, and divide by 166 to find the number of boxes that she can cover.

[tex]\frac{1328}{166} = 8[/tex]

Hope that helps!

Answer:

Step-by-step explanation:

Firstly lets calculate the total surface area of the cuboid

Total surface area of cuboid (A1)

= 2( l*b+ b*h +l*h)

= 2( 7 * 5+ 5 * 4 + 7 * 4)

= 166 ft²

also given that

Total area of the wallpaper ( A2)= 1328 ft²

Now

Number of boxes that she can cover is

= A2 / A1

= 1328 / 166

= 8 BOXES.

hope it will help :)

What is the value of x and why

Answers

Answer:

x = 7.5

Step-by-step explanation:

If two scants are drawn from a point outside the circle then the product of one secant and its external segment is equal to the product of other secant and its external segment.

By applying this property in the picture attached,

OB × OA = OC × OD

(6 + 3)6 = (12 - x)12

54 = 144 - 12x

12x = 144 - 54

12x = 90

x = 7.5

A car park has 20 vehicles 12 of them are cars.what fraction of the vehicles are cars?​

Answers

3/5 of the vehicles are cars.
hope this helped.

The origin of a coordinate plane is (0,0)
True or False

Answers

Answer:

true

hope it is helpful to you

Answer:

The Answer is gonna be True

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