in an effort to improve a statistics course, we want to interview randomly chosen students about their attitudes toward the class. there are 800 students currently enrolled, and six instructors who teach sections of the course.

Answers

Answer 1

Stratified random sample would be the sampling design for the best information.

• In statistics, stratified sampling is an method of sampling from a population which can be divided into subpopulations. In surveys based on statistics, when subpopulation within an overall population var, it could be advantageous to sample each population separately.

• For example one may divide a sample of children into subgroups by age like 1-5,6-10,11-15 and above.

• The benefits of stratified sampling is that you can obtain reasonably precise estimate for subgroups related to the research.

• One disadvantage of stratified sampling is that the selection of appropriate strata for a sample of your research may be difficult.

• The effective use of stratified sampling can be Analysing 30% of the items under $30,000.

In this question we use stratified sampling.

Learn more about Sampling here

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Related Questions

Which of the following is equivalent to 7(a + 4) + 15?

7a + 43
7a + 19
7a + 60
28a + 15

Answers

Answer:

7a + 43

Step-by-step explanation:

Let's simplify step-by-step.

7(a+4)+15

Distribute:

=(7)(a)+(7)(4)+15

=7a+28+15

Combine Like Terms:

=7a+28+15

=(7a)+(28+15)

=7a+43

Answer:

7a + 43

Step-by-step explanation:

Given:

7(a + 4) + 15

Solve:

Distribute:

7(a + 4) + 15

7 × a = 7a7 × 4 = 28

Now we have:

7a + 28 + 15

Add the numbers:

28 + 15 = 43

7a + 43

Therefore, 7a + 43 is equivalent to 7(a + 4) + 15.

Kavinsky.

please help first answer will be marked brainiest

Answers

Answer:

Step-by-step explanation:

add sides up

am I'm correct I linked a picture with it

Answers

Answer: B

Step-by-step explanation:

Use the Triangle Theorem.

Now, we have to find every number involved squared.

2² = 4

3.6² = 12.96

Add the given components.

12.96 + 4 = 16.96

Our final answer is 16.96

Best of Luck!

Answer:

TRUST ME ITS C

Step-by-step explanation:

use the theorem

2 squared is 4

3.6 squared is 12.96

you need to add them which is 16.96 and find its square root

Hey, Whats The answer please explain your answer marking brainliest:D...............................

Answers

Answer:

B. Kevin is correct. Amy did not line up the decimals correctly.

Step-by-step explanation:

Answer: B

Step-by-step explanation:

B- kevin is correct because amy did not line up the decimals correctly

PLEASE HELP MY ASSIGNMENT IS DUE IN LESS THAN A HOUR!!!!

Answers

Answer:

77 degrees c:

Step-by-step explanation:

I think it is 94.4 if you do it to 1 dp

Hope this helps

the clock below shows what time mason mom drop him off for practice. what time does his mom drop him off

Answers

Answer:

4:05?

Step-by-step explanation:

Answer:

Step-by-step explanation:

This doesn't make sense.

13x + 9 equals 6x - 12

Answers

Answer: okay is that a question?

Step-by-step explanation:

Answer:

[tex]given \\ 13x + 9 = 6x - 12 \\ = > 13x - 6x = - 12 - 9 \\ = > 7x = - 21 \\ = > x = \frac{ - 21}{7} \\ = > x = - 3[/tex]

it may be helpful for youif any problem then consulting with me

4. Paula drew a map of her neighborhood on a coordinate grid. A grocery store is located at point (5,-4). A park is located at point (-5,4). Paula's house is located halfway between the grocery store and the park. A school is located halfway between Paula's house and the park. What are the coordinates of the school?

Answers

Answer:

Midpoint Formula= (x1+x2)/2, (y1+y2)/2

Plug in the numbers

Answer= (0, 0)

I hope this helps you!!

Can you please help me with 6

Answers

Answer:

Third choice, 3/4

Step-by-step explanation:

Add all the cubes together, 12 + 5 + 3 = 20

There's a 12/20, which is 3/5, chance you'll get a green cube

5/20, which is 1/4, chance you'll get a blue cube

And there's a 3/20 chance you'll get a yellow cube

The probability of not getting a blue cube is 12/20 + 3/20 = 15/20 = 3/4

Write y=−4x−4 in standard form .

Answers

Answer:

Y=-4x-4= [tex]x=- \frac{y+4}{4}[/tex]

Step-by-step explanation:

Answer: The answer is x=–y+4/4?

Step-by-step explanation:

ASAP PLZ HELP ME WITH THE QUESTION

Answers

Answer:

(0, 0)

Step-by-step explanation:

None

I’m alive but I’m dead. Sad :(

what is the last number to put in the following question i am confused ..

Answers

Answer:

2^6

Step-by-step explanation:

2^6=64

2x2x2x2x2x2=64

it's 2 to the power of 6

How long is the carrot?

Answers

Answer:

4 3/4 inches

Step-by-step explanation:

Answer:

[tex]4\frac{3}{4}[/tex]

Step-by-step explanation:

Jorie leaves work 30 minutes late. She decides to make up time by taking the toll road instead of side streets. She can travel four times faster by taking the toll road. Create an equation to represent her total travel time, including wait time, where x is the number of minutes the drive was expected to take.

y equals one fourth times x minus thirty
y = 4x − 30
y equals one fourth times x plus thirty
y = 4x + 30

Answers

Answer:

option C

Step-by-step explanation:

We know that the toll road is 4 times faster than the side streets.If 'x' represents the number of minutes she usually spend taking the side streets. The represents the time she takes taking the toll road.Also we need to create an equation to represent her total travel time, including wait time

I need hellpppp please help meee

Answers

Answer:

i believe >

Step-by-step explanation:

I believe it’s > to:)!

What is 3/4 divided by 1/8? Explain or show your reasoning.

Answers

Answer:

Step-by-step explanation:

You just have to flip 1/8 and do 3/4 x 8/1 which would equal to 6.

factorise 7t-6u+5t-4u

Answers

Answer:

-2u(3+2) + t(7+5)

Tip: arranging the like terms next to each other helps to keep things from getting messy.

Find the angle of elevation
from point C to point A.
A
?
59°
402 m
C
B
Angle of elevation = [?]°

Answers

180-90-59 = 31 degrees

what is the slope of the line described by the equation below y-6=-2(x-8)

Answers

Answer:

-2

Step-by-step explanation:

you have to rearange in the form of

y=mx+b, where m is the slope

y -6= -2( x-8)

y = 6 -2x + 16

y= -2x +22

slope is -2

Bonnie is three times as old as her brother, h. The sum of their ages is less than 44. What is the greatest age Bonnie’s brother can be?
Which inequality models this problem?

A. 3h + h 44
D. 3h + h ≥ 44

Solve:

Answers

the answer is D .
because it says less than 44

ASAP PLZ HELP ME WILL AMRI AS BRAINLIST

Answers

Answer:

x=4

Step-by-step explanation:

Answer:

x=4

Step-by-step explanation:

Need help for this one!!

Answers

SAS hopefully this helps!

Someone help!Will give 20 brainly
What are the valid values of x in:
16−−√+x=10

Answers

The valid values of x is x = 36

How to determine the valid values of x?

The equation is given as

16 - √x = 10

Subtract 16 from both sides of the equation

So, we have

√x = -6

Take the square of both sides of the equation

So, we have

x = 36

Hence, the valid values of x is x = 36

Answers

Answer:

e) cos(90-x)

Step-by-step explanation:

sinx=cos(90-x)

Simplify the expression by combining like terms.
15 + 12z– 5z + 4y- 7

Answers

Answer: = 4y + 7z + 8

Answer:

7z+4y+8

Step-by-step explanation:

Collect the like terms so 12z-5z would be 7z, then since there is only 1 y term it would be 4y, and -7 + 15= 8

What is [tex]\frac{2}{5}[/tex] as a decimal

Answers

Answer:

0.4

Step-by-step explanation:

2 x 20=40

5 x 20=100

40/100= 0.40 simplified as 0.4

Answer:

2/5 as a decimal is 0.4

Step-by-step explanation:

2 divided by 5 would equal 0.4

Identify the slope shown in the linear equation below. y = - 5x + 3

Answers

Answer:

Slope: -5 Y-intercept: 3

Step-by-step explanation:

the slope intercept of a linear equation is:

y=mx+b

were m is slope. and b is the y intercept

therfore the problem is:

y=-5x+3

m=-5 so the slope is -5

b=3 so the y-intrercept is 3

Answer:

-5

Step-by-step explanation:

The slope is always in front of the x

HELP ME FIND X ASWELL PLEASE USING THE SAME KITE

Answers

All kites equal to 360 degrees X = 99 degrees and y= 54 degrees. Side A would be 153 degrees I believe

Answer:

a=18units

x=99°

y=108°

Step-by-step explanation:

Perimeter=sum of lengths around the kite.

Given that two sides each are congruent:

P=12+12+a+a

60=24+2a

60-24=2a

36=2a

a=36/2=18

x=99°

y+99+99+54=360°(sum of interior angles of a quadrilateral)

y+252=360

y=360-252

y=108°

I ordered some books online for myself and friends. Each book costs $13 and the store charges a flat rate for shipping of $20. Write an algebraic expression to show the total cost of the books. Let n represent the number of books.

Answers

Answer:

13n+20

Step-by-step explanation:

Answer: the answer is 13n+20

Step-by-step explanationn: IM TAKING THE TEST

Solve for x: 3x + 4 = 9x + 3

Answers

Answer:

x = 1/6

Step-by-step explanation:

Subtract 4 from both sides of the equation.

3x + 4 - 4 = 9x + 3 - 4

Simplify, subtract the numbers.

3x = 9x - 1

Subtract 9x from both sides of the equation.

3x - 9x = 9x - 1 - 9x

Simplify, combine like terms.

-6x = -1

Divide both sides of the equation by the same term.

-6x/-6 = -1/-6

Simplify, cancel terms that are in both the numerator and denominator, and divide the numbers.

x = 1/6

The solution to the given equation 3x + 4 = 9x + 3 is x = 1/6.

The equation is given as follows:

3x + 4 = 9x + 3

To solve the equation 3x + 4 = 9x + 3 for x, we need to isolate the variable x on one side of the equation.

Start by subtracting 3x from both sides of the equation to move all the terms involving x to one side:

3x - 3x + 4 = 9x - 3x + 3

4 = 6x + 3

Next, subtract 3 from both sides to isolate the term with 6x on the right side:

4 - 3 = 6x + 3 - 3

1 = 6x

Divide both sides of the equation by 6 to solve for x:

(1)/6 = (6x)/6

1/6 = x

Thus, the solution to the equation is x = 1/6.

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