On a recent statistics exam at a large university, 35 of 50 students in one section passed the exam.
What is the mean and standard deviation of the proportion of those who passed the exam?
A. Mean = 70%; standard deviation = 3.5%
B. Mean = 70%; standard deviation = 6.48%
C. Mean = 70%; standard deviation = 4.2%

Answers

Answer 1

Answer:

answer is c

Step-by-step explanation:

i know


Related Questions


what is the missing fraction on the spinner? some1 helppp

Answers

Answer:

7/16

Step-by-step explanation:

100/12 as a mixed number

Answers

Answer:

8 and 1/3

Step-by-step explanation:

100 divided by 12 and then the leftover. Also needs to be simplified from 4/12 to 1/3 (:

51 POINTS ANSWER (correctly) QUICKLY
Rectangle MPAT has vertices M(1, 2), P(1, 3), A(3, 3), and T(3, 2). ​ Rectangle MPAT ​ was translated 1 unit right and 2 units up to produce rectangle M'P'A'T'.

Which coordinates describe the vertices of the image?

A. M'(3, 3), P'(3, 4), A'(5, 4), and T'(5, 5)
B. M'(2, 2), P'(2, 3), A'(4, 3) , and T'(4, 2)
C. M'(1, 4), P'(1, 5), A'(3, 5) , and T'(3, 4)
D. M'(2, 4) , P'(2, 5) , A'(4, 5) , and T'(4, 4)

Answers

Answer:

D. M'(2, 4) , P'(2, 5) , A'(4, 5) , and T'(4, 4)

Step-by-step explanation:

The translation rule is:

(x, y) → (x + 1, y + 2)

Apply this rule to the vertices:

M(1, 2) → M'(1 + 1 = 2, 2 + 2 = 4)P(1, 3) → P'(1 + 1 = 2, 3 + 2 = 5)A(3, 3) → A'(3 + 1 = 4, 3 + 2 = 5)T(3, 2) → T'(3 + 1 = 4, 2 + 2 = 4)

Correct choice is D

2. Find the slope, the y-intercept and then write the equation of the line.​

Answers

Answer:

Y =3x/2 is the equation of the line.

Slope is 3/2

Y intercept is zero

What is the product?
361
[-1 2 41x2 40
0 62
0
이에
26
7
o [126 7 기
ㅇ[73891
7
0 138
9

Answers

Answer:

i think the profuct is joe

Step-by-step explanation:

j

o

e 1-357=1

In a triangle ABC, a =3, b=4 , c =5 cm. Find the area of the triangle.

Answers

Answer:

6 cm²

Step-by-step explanation:

The shorter sides are base and height.

3 x 4 / 2

= 6

We have: a² + b² = 3² + 4² = 9 + 16 = 25 = 5² = c²

=> triangle ABC is a square triangle

=> the area of the triangle ABC is: a × b ÷ 2 = 3 × 4 ÷ 2 = 6 (cm²)

Answer: 6 cm²

Ok done. Thank to me :>

Jeremiah is factoring 0.64t^24 – 9 by using the rule a^2 – b^2 = (a + b)(a – b).
What will he use for the value of a?

A. 0.8t^12

B. 0.08t^12

C. 0.8

D. 0.64

Answers

Answer:

[tex]0.8\, t^{12}[/tex] (assuming that [tex]a \ge 0[/tex].)

Step-by-step explanation:

The rule [tex]a^{2} - b^{2} = (a + b)\, (a - b)[/tex] describes a way for factoring the difference between two perfect squares [tex]a^{2}[/tex] and [tex]b^{2}[/tex].

Setting [tex]a^{2} = 0.64\, t^{24}[/tex] and [tex]b^{2} = 9[/tex] would ensure that [tex](a^{2} - b^{2})[/tex] match the given expression.

Take the square root of both sides of the equality [tex]a^{2} = 0.64\, t^{24}[/tex]. Make use of the fact that for all [tex]x \ge 0[/tex], [tex]\sqrt{x} = x^{1/2}[/tex].

[tex]\displaystyle \sqrt{a^{2}} = \sqrt{0.64\, t^{24}}[/tex].

[tex]\begin{aligned} a &= \left(\sqrt{0.64}\right)\, \sqrt{t^{24}} \\ &= 0.8\, (t^{24})^{1/2}\\ &= 0.8 \, t^{24 \times (1/2)} \\ &= 0.8\, t^{12}\end{aligned}[/tex].

A teacher writes the expression 3 (6m + 3) and asks for students to write equivalent expressions. The table shows the students' responses.
Student
1
2
3
4
Response
9m + 6
18m + 3
18m + 9
21m
Select the best answer from the choices below:
Student 1 is correct because distributing the 3 in the teacher's expression yields Om + 6
Student 2 is correct because distributing the 3 in the teacher's expression yields 18m + 3
Student 3 is correct because distributing the 3 in the teacher's expression yields 18m + 9
Student 4 is correct because distributing the 3 in the teacher's expression, and then adding the two terms together yields 21m

Answers

Student 3 is correct. This is because you can distribute 3. You would do 3x6m, or 18m, and you can do 3x3, or 9. This means that Student 3 is correct. Since m is not defined as an integer, it can’t be any of the other choices.
Student 3 is correct because distributing the 3 in the teacher's expression yields 18m+9. Basically, everything in the parentheses was equally multiplied by 3, and you cankt add a variable and a number without one together, so it is the final and correct answer.

greatest comman factor of 35 + 50

Answers

Answer:

The GCF of 35 and 50 is 5

Solve for X. 4.5/x = 3/4

Answers

Answer:x = 6

Step-by-step explanation:

because each 1/4 is equal to 1.5 in this instance. Making 3 of these equal parts equal to 4.5, and all 4 of them equal to 6 (the denominator).

Maddie does not have any pretzels.
Zach gives Abbey 8 pretzels. Then he splits half of the pretzels he has left with Maddie.
Zach lets p represent the number of pretzels he starts with. He finds that the number of pretzels that Maddie has is the difference of p and 8.
Write an expression to represent the number of pretzels that Maddie has
< 23 24 25
26
27
23
30
31
32
> 28 of 36
Finish Later
II
Sunt

Answers

so zach starts with x

he gives abbey 8

x - 8

now he has x - 8 pretzels

he gives half of x - 8 to maddie

0.5x - 4 = how many maddie has at the end

x - 8 = 0.5x - 4

2x - 16 = x - 8

x = 8

Please find which inequality has a solution that is represented by the graph below

Answers

It’s letter B the right answer is B

Answer:

your answer is D

yes, I checked

Please educated people solve my question.. i asked it an hour ago nobody knows it

Answers

AB = AX+XB = 6+18 = 24

The ratio of AB to AX is AB/AX = 24/6 = 4

AC = AY+YC = 10+25 = 35

The ratio of AC to AY is AC/AY = 25/10 = 3.5

The results of each division are 4 and 3.5

We do not get the same result, which means that the proportion [tex]\frac{AB}{AX} = \frac{AC}{AY}[/tex] is not true. This is sufficient to prove that the triangles aren't similar. We need them to be in proportion so that we can use the SAS similarity rule.

Answer: The triangles aren't similar

whats the answer for this oneeeeeeb

Answers

Answer:

x ≈ 229.8

Step-by-step explanation:

using the cosine ratio in the right triangle

cos72° = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{LM}{KM}[/tex] = [tex]\frac{71}{x}[/tex] ( multiply both sides by x )

x × cos72° = 71 ( divide both sides by cos72° )

x = [tex]\frac{71}{cos72}[/tex] ≈ 229.8 ( to the nearest tenth )

probability

pls help

Answers

Answer:

inbox I think maybe I can help



What is the area of the model

Answers

The area of the model is 100.25in^2
So, letter D

I need help!!!!!!!!!

Answers

I don't know this stuffit looks really hardI'm in 6 gradewhat grade work is thissorry but I can not help youbut one thing is for sureI think think its the fourth oneit looks less than bla bla bla and greater than bla bla blapeople say I'm smartits true I'm smartbut some work I don't understandlike don't get me wrong on thisthis is suppose to be a app that helps people to do there worknot a app for other people to help others to do there work rightis that not truethis app just want to bla bla blayou don't know ant to know well it time for me to goI'll mabey not see you againbecause you'll be dead muhahahahI'm a hacker I can hack you anytime I want muhahaha

Write a sine function that has a midline of 5, an amplitude of 2 and a period of 3pi

Answers

I hope this helps (:

urgent!!!!!!
in an oblique triangle two sides measure 6cm and 12 cm and the angle across from the side that is 12cm in length measures 58°. to the nearest whole, what are the measures of the other two angles

Answers

Answer:

25° and 97°

Step-by-step explanation:

Oblique triangle : any triangle that is not a right triangle

Use the sine rule to find one of the unknown interior angles:

[tex]\dfrac{sin(A)}{a}=\dfrac{sin(B)}{b}=\dfrac{sin(C)}{c}[/tex]

where A, B and C are the interior angles of a triangle, and a, b and c are the sides opposite to the interior angles.

[tex]\implies \dfrac{sin(58)}{12}=\dfrac{sin(B)}{6}[/tex]

[tex]\implies sin(B)=\dfrac{6sin(58)}{12}=0.4240240481...[/tex]

[tex]\implies sin(B)=25.08890446...=25 \textdegree \ \ \textsf{(nearest whole)}[/tex]

Sum of interior angles of a triangle = 180°

⇒ Missing angle = 180 - 58 - 25 = 97°

According the contract, which of the following is not a responsibility of the HOA? a. Monitor overnight parking at least once a week b. Give a written warning for the first infraction of overnight parking c. Give a written warning for the second infraction of overnight parking d. Tow the car of a homeowner who has parked in the street overnight five nights in a row.

Answers

Answer:

The correct answer is letter D: tow the car of a homeowner who has parked in the street overnight five nights in a row.

This rule was not mentioned in the said contract. HOA specifically notified that if a person violates the rule more than three times, fines will be given to this violator.

Step-by-step explanation:

Answer:

its c

Step-by-step explanation:

did the test got it wrong but it showed the answer

. Paige can complete a landscaping job in
6 hours. Malia can complete the same job in
4 hours. Working together, how long would it
take them to complete the job?

Answers

maybe less than 4hrs since there’s two working together and since malia can complete less than Paige

Togetherly Paige and Malia can complete the job in 2.4 hours,

What is the rate of change?

Rate of change is defined as the change in value with rest to the time is called rate of change.

Here,
Let the amount of work be x,
Paige complete x work in 6 hours
So the unit rate of doing work of page = x / 6
Similarly,
The unit rate of doing x work of Malia = x / 4

Sum of the unit rate = x / 6 + x /4 = 5x/12
Now,
Time = work/unit rate
Time = x / [5x/12]
Time = 12/5
Time = 2.4 hours

Here, togetherly Paige and Malia can complete the job in 2.4 hours,

Learn more about the rate of change here:

https://brainly.com/question/13103052

#SPJ2

Suppose your​ friend's parents invest $20,000 in an account paying 6% compounded annually. What will the balance be after 6 ​years?

Answers

Answer:

28,370.38

Step-by-step explanation:

If accumulated but not compounded

.06 * 20,000 = 1200 per year

1200 * 6 = 7200 total interest

7200 + 20,000 = 27,200

If compounded annually

20,000 * 1.06^6 = 20,000*1.4185 = 28,370.38

just an addtion to the reply above.

[tex]~~~~~~ \textit{Compound Interest Earned Amount} \\\\ A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill &\$20000\\ r=rate\to 6\%\to \frac{6}{100}\dotfill &0.06\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{annually, thus once} \end{array}\dotfill &1\\ t=years\dotfill &6 \end{cases} \\\\\\ A=20000\left(1+\frac{0.06}{1}\right)^{1\cdot 6}\implies A=20000(1.06)^6\implies A\approx 28370.38[/tex]

Please answer this correctly
Thanks :)))))

Answers

Answer:

Here you go

Step-by-step explanation:

1. Equiangular triangle

2. Isosceles triangle

3. Right angle triangle

4. Scalene triangle

5. Obtuse angle triangle

6. Acute angle triangle

7. Equilateral triangle

8. corners

9. angles

10. triangle

Answer:

Step-by-step explanation:

Equiangular triangle

2. Isosceles triangle

3. Right angle triangle

4. Scalene triangle

5. Obtuse angle triangle

6. Acute angle triangle

7. Equilateral triangle

8. corners

9. angles

10. triangle

Joshua has a ladder that is 18 ft long. He wants to lean the ladder against a vertical wall so that the top of the ladder is 17.7 ft above the ground. For safety reasons, he wants the angle the ladder makes with the ground to be no greater than 78°. Will the ladder be safe at this height?

Answers

For safety reasons \theta should not be greater than 70 and with the current scenario\theta= 79.52

the ladder will not be safe at this height

\theta= 79.52

Arithmetic

Question Parameters:

Joshua has a ladder that is 18 ft long.

He wants to lean the ladder against a vertical wall so that the top of the ladder is 17.7 ft

Generally the equation for the angle ABC is mathematically given as

Let ∠ABC = \theta

In the right angle triangle ACB,

Hence

sin ∠ABC  = AC / AB

sin \theta = 17.7 / 18

[tex]\theta = sin-1 (17.7 / 18)\\\\\theta = 79.52[/tex]

For more information on Arithmetic

https://brainly.com/question/22568180

Evaluate the indefinite integral using substitution method.
[tex]\displaystyle \large{\int {(x-2)\sqrt{3-x}} \ dx }[/tex]

Answers

[tex] \frac{2(3 - x)^{ \frac{5}{2} } }{5} - \frac{2(3 - x)^{ \frac{3}{2} } }{3} + C[/tex]is the answer

Step-by-step explanation:-

Given:

[tex]{\int {(x-2)\sqrt{3-x}} \ dx }[/tex]

Differentiate on both sides,

[tex]{\int {(x-2)\sqrt{3-x}} \ dx },u = 3 - x[/tex]

Isolate and substitute back,

[tex]{\int {(x-2)\sqrt{3-x}} \ \times ( - 1) du },u = 3 - x[/tex]

Substitute back,

[tex]{\int ( - ( - u + 3 - 2) \sqrt{u})du }[/tex]

Applying property of integral kf(x)dx = kf(x)dxdx,

[tex] - ∫ ( - u + 3 - 2) \sqrt{u} \: du,u = 3 - x[/tex]

Combining like terms,

[tex]- ∫ ( - u +1) \sqrt{u} \: du,u = 3 - x[/tex]

Now applying distributive property,

[tex]- ∫ (( - u +1) \sqrt{u}) \: du,u = 3 - x[/tex]

[tex] = > - ∫ ( - \sqrt{u} \times u + \sqrt{u} )\: du,u = 3 - x[/tex]

Converting to exponential form,

[tex]- ∫ ( - u^{ \frac{1}{2} } \times u + u^{ \frac{1}{2} } )\: du,u = 3 - x[/tex]

Multiplying the first two monomuals after integral, we get,

[tex]- ∫ ( - u^{ \frac{3}{2} } + u^{ \frac{1}{2} } )\: du,u = 3 - x[/tex]

Now applying the prperty of ∫ f(x) + g(x)dx = ∫ f(x)dx + ∫ g(x)dx,

[tex] - ( - ∫u^{ \frac{3}{2} } \: du + ∫u^{ \frac{1}{2} } \: du),u = 3 - x[/tex]

Now integrate the power rule,

[tex] - ( - \frac{u^{ \frac{5}{2} }}{ \frac{5}{2} } + \frac{u^{ \frac{3}{2} }}{ \frac{3}{2} } ),u = 3 - x[/tex]

Divide the fractions by multiplying its reciprocals,

[tex] - ( - u^{ \frac{5}{2} } \times \frac{2}{5} + u^{ \frac{3}{2} } \times \frac{2}{3}),u = 3 - x[/tex]

Now write as single fractions,

[tex] - ( - \frac{2u^{ \frac{5}{2} } }{5} + \frac{2u^{ \frac{3}{2} } }{3})[/tex]

Removing the parentheses,

[tex] \frac{2u^{ \frac{5}{2} } }{5} - \frac{2u^{ \frac{3}{2} } }{3},u = 3 - x[/tex]

Substitute back,

[tex] \frac{2(3 - x)^{ \frac{5}{2} } }{5} - \frac{2(3 - x)^{ \frac{3}{2} } }{3} [/tex]

Now adding the constant of integration C∈R,

[tex] \frac{2(3 - x)^{ \frac{5}{2} } }{5} - \frac{2(3 - x)^{ \frac{3}{2} } }{3} + C[/tex]

Hence, the answer.

CONVERT 24-HOUR TO 12-HOUR

1. 21:30
2. 08:50
3. 10:45
4. 19:36

Answers

Answer:

1) 09:30

2) 08:50

3) 10:45

4) 07:36

Step-by-step explanation:

I hope this helps!!

Help!!,!, please
y = 2x + 4
6x – 3y = -12

And
y = 2x
-8x – 2y = 24
System by substitution

Answers

Answer:

y = 2x + 4

y = 2x + 46x – 3y = -12

y = 2x + 46x – 3y = -12And

y = 2x + 46x – 3y = -12Andy = 2x

y = 2x + 46x – 3y = -12Andy = 2x-8x – 2y = 24

Step-by-step explanation:

hope it helps you

I'm not asking for too much so PLS help
I'M DESPERATE :(​

Answers

Answer:

no

Step-by-step explanation:

theses expressions do not have the same values because they both have differant answers.

when put in a calculator: [tex]\sqrt{100-64[/tex] = 6

and [tex]\sqrt{100[/tex] - [tex]\sqrt{64[/tex] into the calculator you get =2  (the sqrt of 100= 10 and the sqrt of 64=8)     (10-8=2)

Answer:

ok so lets just talk about what each one represents

the first one represents the square root of 100-64 so

the square root of 36 is 6

the second one is the square root of 100 minus the square root of 64 so

10-8=2

the first one is 6

the second one is 2

so no

Hope This Helps!!!

A balloon containing 0. 500 mol Ar at 0. 00°C and 65. 0 kPa pressure is expanded by adding more argon. Formula: PV = nRT (R = 8. 317 L•kPa/mol•K) What is the original volume of the gas? L.

Answers

Using an ideal gas equation to solve the problem. Then the original volume is 17.67 liters.

What is an ideal gas equation?

An ideal gas is a theoretical composed of a set of randomly moving gas particles that interact only through elastic collision.

Given

A balloon containing 0.500 mol at 0. 00°C and 65.0 kPa pressure are expanded by adding more argon.

Pressure (P) = 65 kPa

Mole (n) = 0.5 mol

Temperature (T) = 0 °C = 273.15 K

Universal gas constant (R) = 8.317 L.kPa/mol.K

We know the ideal gas equation

[tex]\rm PV =nRT\\\\V \ \ = \dfrac{nRT}{P}[/tex]

Put the values, we have

[tex]\rm V = \dfrac{0.5*8.317*273.15}{65}\\\\V = 17.67[/tex]

Thus, the original volume is 17.67 liters.

More about the ideal gas equation link is given below.

https://brainly.com/question/4147359

Answer:

answer in picture

Step-by-step explanation:


On a timer someone please help!!

Answers

Answer:

B. x^1/8 y^8

Step-by-step explanation:

here are the steps so you understand better

Other Questions
in the calendar analogy, what month did Eukaryotes appear? A. may B. february C. July D. December Jenny works at Publix where she makes $10 an hour. she works 5 hour ships 6 days a week . Create an expression that shows how much money jenny makes in 3 weeks A cyclist is travelling at 4.0 m/s. She speeds up to 16 m/s in a time of 5.6 s. Calculate her acceleration. ( multi choice) ( science) What are the ways that oxygen enters our body? A. noseB. mouthC. earsD. eyes concept of pattern in mathematics. pleas help it is in the screenshot An example of structural unemployment is a(n):________.a. worker at a fast food restaurant who quits work and attends collegeb. real estate agent who leaves a job in Texas and searches for a similar, higher paying job in Calic. autoworker who is temporarily laid off from an automobile company because of a decline in salesd. geologist who is permanently laid off from an oil company because of an increase in wages won by labor unions What is the measure of arc ef in circle h? 41 50 114 173. In the story The Boy Who Loved Ice Cream which lines tell us that Benjys family was poor? At room temperature most elements are classified as. Which picture correctly shows the path of the reflected light ray?Select one:a. Ab. Bc. Cd. D PLSSS ANSWER ITS FOR A TIMES TEST.......Lee's bank balances at the end of months 1, 2, and 3 are $1600, $1640, and $1681.What will Lee's balance be at the end of month 5? n artist who uses a spontaneous, less fussy approach to painting can be said to be using the ____________ techniq solve this on a piece of paper so it can be great to understand thankyou.8x+4y=8 and 2x+y=4 pls can u gus tell me the ans and explanation you can turn the Caps lock key on, and that will give you a more _______ curser. Help please!!! I really dont know how to do this! [Answer: ALeaming Objective: Grammar)Question type: Fill in the BlankWrite the past tense of the verb in parentheses. .9. Kirk: What did you do last night?Jan: Weat a restaurant, (eat)[Answer: ateLearning Objective: Grammar)10. Carol: Did you know Anna was sick last week?Claire: Yes, I(know) . What is the name of the perimeter of a circle?LengthCircumferencePerimeterWidth Solve for y2(y + 2) = 62(y+2)=6