Mathematics High School

Kari plans to sample 20 people of a population that contains 100 students. She wants to determine how many people wake up before 6 a.m. Which sample is the most random?
the first 20 students who arrive at school in the morning
all 20 boys on the swim team
5 students out of each of the 4 homeroom classes
the last 20 people in line for breakfast in the cafeteria

Answers

Answer 1

Answer:

5 students out of each of the 4 homeroom classes

Step-by-step explanation:

Answer 2

The most random sample is 5 students out of each of the 4 homeroom classes.

Thus, option (C) is correct.

Selecting 5 students from each of the 4 homeroom classes ensures that the sample represents a diverse range of students from different classes.

This approach helps to minimize bias and increase the randomness of the sample.

The other options, such as selecting the first 20 students who arrive at school or the last 20 people in line for breakfast, may introduce some bias based on the specific circumstances or characteristics of those groups. Selecting all 20 boys on the swim team would also not provide a representative sample of the overall student population.

Thus, option (C) is correct.

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Related Questions

1. Find the maximum and minimum values of z = 2x + 3y subject to the following constraints
[tex]0 \leqslant x \leqslant 7[/tex]
[tex]y \geqslant 1[/tex]
[tex]2x - y \geqslant - 5[/tex]
[tex]x + y \leqslant 11[/tex]
Copy and paste the text below and put your answers into the blanks. maximum value =
when x =
and y =
minimum value =
when x =
and y=

Answers

Answer:

Minimum Values:

x = 0, y = 1, z = 3

Maximum Values:

x = 7 , y = 11 , z = 47

Step-by-step explanation:

FOR MINIMUM VALUES:

0<= x <= 7

It is clear from the above inequality that the minimum value of x must be 0.

y>= 1

This inequality shows that the minimum value of y must be 1. Using these minimum values of x and y to get the minimum value of z:

z = 2x + 3y

z = (2)(0) + (3)(1)

z = 3 (Minimum)

FOR MAXIMUM VALUES:

0<= x <= 7

It is clear from the above inequality that the maximum value of x must be 7.

x + y <= 11

To calculate maximum value of y we can use the minimum value of x in this inequality:

0 + y <= 11

y <= 11

Hence, the maximum value of y is 11.

Using these maximum values of x and y to get the maximum value of z:

z = 2x + 3y

z = (2)(7) + (3)(11)

z = 47 (Maximum)

Evaluate 3a+15+bc−6, when a=7, b=3, and c=15.

Enter your answer in the box.

Answers

3(7)+15+(3)(15)-6

21+15+45-6=75

Answer: right answer is 23

Step-by-step explanation:

Evalutate the expression.
10- (-4) + (-4) -5 =

Answers

Answer:5

Step-by-step explanation:

Answer:

Step-by-step explanation:

Are x and y proportional?

Answers

The answer is yessssss

Answer:

yes they are

Step-by-step explanation:

Last year 600 people attended a street fair. This year 950 people attended. What is the percent change from last year to this year?

HELPPPP

Answers

Answer:

Step-by-step explanation:

from 600 people changed to 950 people so increased 950-600=350

if 600 is 100%

then 350 is ?%

?= 350*100/600 = 58.(3)%

so it increased by 58.(3)% since the year before

HELPPPP FASTTT PLEASEE

Answers

Answer:

a probably

Step-by-step explanation:

Rylee estimated that her dog weighed 23 pounds, but the vet's scale
showed that he was 26 pounds. What is the percent error?

Answers

Answer: 3

Step-by-step explanation:

What

what is 6.6 × 10^2 in standard form

Answers

In standard form :660

660

Explanation: When you see ^x, you have to add x many zeroes to the end of your original number! So 7 * 10^3 would be 7000, etc. Hope this helps!

Is it possible to form a triangle with side lengths 3.5 3.5, and 9? If so, will it be scalene, isosceles, or equilateral? Or none

Answers

Answer:

It is not possible to draw a triangle with given measurements of 3.5, 3.5, and 9.

Step-by-step explanation:

Scalene Triangle - All 3 sides have different lengths.

Isosceles Triangle - 2 sides have equal lengths.

Equilateral Triangle - All 3 sides have equal lengths.

You must be thinking that it would be Isosceles triangle, but it is not. The measurements you gave is 3.5, 3.5, and 9. Grab a piece of paper, ruler, and a pencil. First draw the length of 9 cm with your pencil and ruler (let us pretend that the measurements are in cm). Then draw 3.5 cm by placing your ruler on the end/start of your 9cm line that you drew before. Then, once again draw a 3.5 cm on the other end of the 9cm line. You will see something like the picture above. You can see that the two sides of the triangle are not intersecting on the top. This means that the triangle formation cannot be made by the given measurements of 3.5, 3.5, and 9.

I hope you understand my answer and this is an easy way to find if, from the given measurements, a triangle is able to be drawn. Thank you !!

The given side lengths, 3.5 3.5, and 9, cannot form a triangle.

The Triangle Inequality TheoremThe triangle inequality theorem states that for any triangle, the sum of any two of its side must be greater than the length of the third side.

Given the side lengths, 3.5 3.5, and 9:

3.5 + 3.5 (7) is not greater than 9

Thus, we can conclude that the given side lengths, 3.5 3.5, and 9, cannot form a triangle.

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5x+20=55 what does x equal?

Answers

Answer:

5x+20=55

5x=55-20

x=30/5=7

Answer:

x = 7

Step-by-step explanation:

5x + 20 = 55

- 20 - 20

5x (÷5) = 35 (÷5)

x = 7

will give brainliest

Answers

Answer: 65°

Step-by-step explanation:

the answer is 65 because they are supplementary

What is 2x + 7y = -14 in y=Mx+b form

Answers

Answer: y= -2/7x-2

Step-by-step explanation:

In AWXY, Y = 3.6 inches, w = 6 inches and ZX=147º. Find
the length of x, to the nearest 10th of an inch.

Answers

Answer:

9.2

Step-by-step explanation:

Answer:

9.2

Step-by-step explanation:

delta math

Jeans are on sale for 25% off. The jeans Bailee wants to buy are marked with an original price of $60. What is the total cost, in dollars, for a pair of jeans at the sale price, including a 7% tax?

Answers

25% of 60 is 15$ so the sale price would be 45$
7% tax = 3.15
= $48.15

I hope this helps :)

The total cost for a pair of jeans at the sale price including 7% tax is $96.30.

What is Percentage?

Percentage, denoted by %, is defined as the parts of a number per fraction of 100.

We have to divide a number with it's whole and then multiply with 100 to calculate the percentage of any number.

here, we have,

Given that,

Original price of the jeans = $60

Discount percentage = 25%

Amount of discount = 25% × 60

= 0.25 × 60

= $15

Price of a jean at the sales price = $60 - $15 = $45

Percentage tax = 7%

Tax amount = 7% × 45 = 0.07 × 45 = $3.15

Price of the jean after tax = $45 + $3.15 = $48.15

Total cost for a pair of jeans = 2 × $48.15 = $96.30

Hence the total cost is $96.30.

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. Derek bought 5 burgers for $9.95. What is the cost for two burgers?

Answers

Answer:

3.98

Step-by-step explanation:

9.95÷5=1.99

1.99×2=3.98

Answer:

$3.98 correct me if im wrong

Step-by-step explanation:

$9.95 ÷ 5 = $1.99

$1.99 × 2 = $3.98

Evaluate k + 26 when k = 10

Answers

Step-by-step explanation:

When k = 10

Then

k + 26

= 10 + 26

= 36

Hope it will help :)

Answer:

Step-by-step explanation:

k = 10

k + 26 =

10 + 26 =

Can someone please help me. I’ll mark u brainiest.

Answers

Answer:

y = 240,000(1.048)^t

Step-by-step explanation:

Initial population: p = 240,000

Annual growth rate: 4.8% = 0.048

Number of years: t

Population in year t: y

y = p(1 + r)^t

y = 240,000(1 + 0.048)^t

y = 240,000(1.048)^t

How do you solve for x and y?

Answers

Answer:

x = 60°, y = 30°

Step-by-step explanation:

The sum of the triangle angles is always 180°

Therefore 90° + x + y = 180°

It is also known that x = 2y

// combine the given value of x into the previous expression

90° + 2y + y = 180°

2y + y = 180° - 90°

3y = 90°

// divide both sides by 3

y = 30°

// then combine the given value of y into the expression x = 2y

x = 2 * 30°

x = 60°

Find the measure of

Answers

Answer:

m∡GHI = 21°

Step-by-step explanation:

Since the lines are intersecting, GHI and JHK are opposite angles, so they are the same measure.

That means you can set them equal to each other

x + 7 = 3x - 21

x = 14

Now plug x into GHI

14 + 7 = 21

m∡GHI = 21°

The first correct answer gets $5 through cash app or paypal. i will be checking! :)

Answers

Answer:

c=116 a=47 b=69 e=86 d=93

Step-by-step explanation:

What 2 whole numbers is the square root of 75 between?

Answers

Answer:

8 and 9

Step-by-step explanation:

HELP I NEED HELP ASAP

Aaron build and sells birdhouses. The expression (8x-3) represents his costs to build x birdhouses. He sells them for $25 each. Which expression represents his profit for building and selling x birdhouses?

Answers

Answer:

D) 17x-3

Step-by-step explanation:

25x-8x-3

17x-3

Every month, $55 is withdrawn from Tom's savings account to pay for his gym membership. He has enough savings to withdraw no more than $495. For how many months can Tom pay for his gym membership?

Answers

Answer:

Step-by-step explanation:

You take the amount of money that the gym membership cost, $55, and you divide that into, the amount of money he has, $495, and then that will leave you with 9 months.

Hope this helps :)))

What is the solution of the system of equations that contains the equation − 3 x − 9 y = 9 ?

Answers

x=-3y-3
..............

SOME ONE HELP ASAP PLS

Answers

Answer:

3566 did the test.

Step-by-step explanation:

Answer:3566

Step-by-step explanation:

Billy charges $15 to mow yard.He needs at least $200 for the new bycicle that he wants.

Answers

Answer:

billy has to mow at least 14 yards

Step-by-step explanation:

200 divided by 15 = about 14

About 3 out of every 5 customers order breadsticks. If there are 40 customers, how many would you expect to order breadsticks?

Answers

Answer:

Step-by-step explanation:

3 out of 5 is 60% and 60% of 40 is 24

You can figure out 60% of 40 by multiplying .60x40 =24

Answer:

24 ?

Steps:

3 customers order breadsticks out of every 5 customers so.

5 times 8 equals 40

so do 3 times 8 which equals 24

if im doing this correctly i-

simlify the expression3(-4x+5)-2(-5x-2). explain your process

Answers

Answer:

-2x+19

Step-by-step explanation:

We open the parentheses, so

-12x+15+10x+4

Simplify

-2x+19

please help please and thank you I need this

Answers

Answer:

Step-by-step explanation:

Write 7/50 as a percent.

Answers

Answer:

14 percent

Step-by-step explanation:

I believe the answer would be 14%

Other Questions

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