To estimate the mean number of text messages sent by cell-phone users, a researcher chooses a location on a college campus in the city and surveys the first 50 people who walk past. These subjects are asked how many text messages they have sent in the past 24 hours. Is it likely that bias will be present in the sample?

A) Because this is a convenience sample, it is likely that the sample results will be unbiased.
B) Because this is a convenience sample of college students, it is likely that bias is present and that the results will overestimate the mean number of text messages sent.
C) Because this is a convenience sample of college students, it is likely that bias is present and that the results will underestimate the mean number of text messages sent.
D) Because this is a voluntary response sample of college students, it is likely that bias is present and that the results will overestimate the mean number of text messages sent.

Answers

Answer 1

Answer:

WARNING! C IS INCORRECT 2021.

MOST LIKELY (B): Because this is a convenience sample of college students, it is likely that bias is present and that the results will overestimate the mean number of text messages sent.

ED2021

To Estimate The Mean Number Of Text Messages Sent By Cell-phone Users, A Researcher Chooses A Location

Related Questions

5+4(8n-8)=-1+6 for n

Answers

Answer:

n=1

Step-by-step explanation:

5+4(8n-8)=-1+6

5+32n-32=5

-27+32n=5

32n=32

n=1

Answer:

n = 1

Step-by-step explanation:

5 + 4(8n - 8) = -1 + 6

First you have to distribute the 4 leaving the equation to look like this...

5 + 32n - 32 = -1 + 6

Now solve the constants (normal numbers without a variable)

-27 +32n = 5

+27 +27 You have to add 27 to BOTH sides

32n = 32

n = 1

Hope this helps and have a great day!

BRAINIEST IF RIGHT George and his dad are planning to attend the state fair. An adult ticket is $19.00. The price of an adult ticket is one third the price of a student ticket plus $15.00. Write an equation to determine how much George will pay for a student ticket.

A one thirdx + 19 = 15

B one thirdx + 15 = 19

C one thirdx − 19 = 15

D one thirdx − 15 = 19

Answers

Answer:

1/3x+15=19

Step-by-step explanation:

so B

Answer:

its b

Step-by-step explanation:

you dont know the price if the student tick so it represents x... one third of a student ticket would be one thirdx. after you do that you will have to add the extra 15 dollars to it in order to get the price if 19 dollars per adult ticket.

alguma menina de 14 anos no tédio to querendo conhecer gente nova?

Answers

Answer:

Step-by-step explanation:

Oi eu tenho 15 anos

Answer:

OIE tudo bem?

eu tenho 15

WILL MARK BRAINLIEST PLEASE HELP
options are

A. 13
B. 15
C. 26
D. 28

Answers

Answer:

weird it should be 65.5 or the other way around hm

Step-by-step explanation:

or maybe im just dumb

You move up 4 units and right 2 units. You end at (-1, 3). Where did you start?

Answers

Answer:

You started at (-3,-1)

-3(5x+2)-(6x-5)
correctly simplify the expression

Answers

Answer:

-21x-11

Step-by-step explanation:

-3(5x+2)-(6x-5)

use distributive property

-15x-6 - 6x-5

put like terms together

-15x-6x-6-5

simplify

-21x-11

hope this helps

Given m|n, find the value of x.

Answers

Answer:

33 degrees

Step-by-step explanation:

Corresponding Angles Postulate

Answer:

33°

Step-by-step explanation:

if m||n then the angle represented with x° and 33° must be equal because these angles are corresponding.

A snail can move approximately 0.30 meters per minute. How many meters can the snail cover in 20 minutes?

Answers

Answer:

Step-by-step explanation:

0.30

x 20

Which expression uses the associative property to make it
easier to evaluate 6(1/3•7/5)
O A. (6.1/3)7/5
O B. (6•5/7)1/3
O C. 6(7/5•1/3)
OD 3(1/6•7/5)

Answers

Answer:

Step-by-step explanation:

Here, we want to select which of the expressions correctly use the associative property

The associative property deals with rearrangement

So for (a + b) + c

we can have (a + c) + b

In the case of this question, the associate property is the one that makes the evaluation easier

Thus;

we need to bring 1/3 and 6 together since 3 is a factor of 6

We have;

(6•1/3)7/5

Two buses are traveling to a state park. One bus leaves the terminal at 4:00 pm, and travels at 40 miles per hour. The second bus
leaves the terminal at 5:00 p.m. and travels at 60 miles per hour.
At what time does the second bus catch up with the first bus?

Answers

Answer:

Step-by-step explanation:

When the second bus catches up to the first bus, this means that the distance they have travelled is equal.

So for bus 1, you know it travels at 40 miles per hour.

4pm = 0 miles

5pm = 40 miles

6 pm = 80 miles

7pm = 120 miles

For bus 2, you know it travels at 60 miles per hour

5pm = 0 miles

6pm = 60 miles

7pm = 120 miles.

So you can see that at 7pm, they will both have travelled 120 miles.

the sum of two nubers is 20. the difference between three times the first number and twice the sencond is 40. find the two numbers.

Answers

16 and 4 are the two numbers.

Solve the equation for z.
-8z + 1 = z-8

Answers

Answer:

z= 1

Step-by-step explanation:

move the like terms, collect then calculate, divide on both sides :)

Answer:

z equals -1

Step-by-step explanation:

-8z + 1 = z-8

-9z + 1 = -8

-9z + 9

-9z ÷ 9

z = -1

Martin painted 255 square feet of his kitchen wall with 23 gallon of paint. If he continues coverage at the same rate, how many square feet can he cover with 2 gallons of paint?765 ft2510 ft2382.5 ft21,020 ft2

Answers

Complete Question

Martin painted 255 square feet of his kitchen wall with 2/3 gallon of paint. If he continues coverage at the same rate, how many square feet can he cover with 2 gallons of paint?765 ft2510 ft2382.5 ft21,020 ft

Answer:

765 square ft

Step-by-step explanation:

2/3 gallon of paint = 255 square feet

2 gallons of paint =

Cross Multiply

2 × 255 square feet/2/3 gallon of paint

= 510 ÷ 2/3

= 510 × 3/2

= 765 square feet

Help math question 1 ,2 ,3 grade 12

Answers

Answers:

a. 20%

60/300 × 100/100

= ( 60 × 100 / 300 ) × 1/100 = 20/100

Calculator: 60 ÷ 300 × 100

b. 90%

270/300 × 100/100

270/300 × 100/100= ( 270 × 100 / 300 ) × 1/100 = 90/100

Calculator: 270 ÷ 300 × 100

c. 58.33%

175/300 × 100/100

100/100= ( 175 × 100 / 300 ) × 1/100 = 58.33/100

Calculator: 175 ÷ 300 × 100

a. 35 Students

Calculator: 10 × 350 / 100

b. 93

Calculator: 10 × 930 / 100

c. 118

Calculator: 10 × 1180 / 100

d. 1036

Calculator: 10 × 10,360 / 100

a. 11.1 (Repeated)

Calculator: 50 / 450 × 100%

b. 6.67 (6 Repeated)

Calculator: 50 / 750 × 100%

c. 4.167 (6 Repeated)

Calculator: 50 / 1200 × 100%

Hopefully this helps:)

how do I find the value of x so f(x)=7

Answers

Answer:

x=5

Step-by-step explanation:

Here we are given with a graph.

we have been asked to find the value of x for which

As we know that , to find the value of x for the given value of f(x), we need to look onto the vertical axis, and mark a dot on the given value now draw a line perpendicular to vertical axis so that it cut the given straight line, and where they intersect draw another line perpendicular to the horizontal axis and you will get the value where it crosses the horizontal axis.

Hence we get x=5, then f(x)=7.

Arrange the four numbers shown in order from least to greatest

6.7%
0.67
6/9
6.7×10-3

Answers

Answer:

Step-by-step explanation:

6.7 x 10 - 3

6.7%

6/9

0.67

In my opinion this should be the answer

Is the following relation a function?

Answers

Answer:

Step-by-step explanation:

It’s a function

Answer:

yes it is a function

Step-by-step explanation:

since the x values dont repeat itself like there are no two of any of the x values then it is a function

Can you please help me solve this and show the solution 4y⁴+6y?

Answers

Answer:

4y^4 + 6y = 256y + 6 = 262y

Step-by-step explanation:

Remove the variables for a second and think of the problem as a normal expression; 4^4 + 6

Simplify the first term; 4^4 = 256

Now, add 6; 256 + 6 = 262

Add back in the variable; 262y

Answer:

2y(2y+3)

Step-by-step explanation:

2y(2y) +6y factor 2y out of 4y^2

2y(2y)+2y(3) factor 2y out of 6y

2y(2y + 3) factor 2y out of 2y(2y)+2y(3)

How do I do this problem im confused?

Answers

Answer: 54800

Step-by-step explanation: plug in 6 instead of t in both the equations. Start with the first equation

-300t+150000

-300(6)+150000= 148200

Then do the other equation

500t+200000

500(6)+200000= 20300

Subtract both

203000-148200= 54800

9)
If l||m and jik,
find the value of y.
(6y + 7)°
1
(5x)
(7x + 24°
m
k
A 7
B) 13
C) 18
D) 65
jump roping
spinning in circles
eating gummy bears
finger painting

Answers

9514 1404 393

Answer:

C) 18 eating gummy bears

Step-by-step explanation:

The angles indicated with x-expressions are supplementary, so we have ...

(5x) +(7x+24) = 180

12x +24 = 180 . . . collect terms

x +2 = 15 . . . . . . divide by 12

x = 13 . . . . . . . . . subtract 2

Then the obtuse angle is ...

7x +24 = 7(13) +24 = 115

The angle marked with a y-expression is a corresponding angle to this, so has the same measure.

6y +7 = 115

6y = 108 . . . . subtract 7; next divide by 6

y = 18

Answer:

y=18

Step-by-step explanation:

5x+7x+24=180

12x+24=180

12x=156

x=13

6y+7+65=180

6y+72=180

6y=108

Solve each of these equations.

3(n+2)=9(6-n)

Answers

Answer:

n= 4

Step-by-step explanation:

3n+6= 54- 9n

12n= 48

n=4

Answer:

Step-by-step explanation:

3n+6=54-9n

-3n

6=54-12n

-54

-48=-12n

N=4

An equation is shown below:

4(x − 3) − 5(x + 1) = 3

Which statement shows a correct next step in solving the equation?

The equation can become 4x − 3 − 5x + 1 = 3 by applying the associative property of multiplication.
The equation can become 4x − 3 − 5x + 1 = 3 by applying the distributive property.
The equation can become 4x − 12 − 5x − 5 = 3 by applying the distributive property.

Answers

Answer:

The equation can become 4x − 12 − 5x − 5 = 3 by applying the distributive property.

Step-by-step explanation:

By applying the distributive law to this equation, we can produce the equation :

4x − 12 − 5x − 5 = 3;

The distributive property is a mathematical function in which each element in the parentheses is multiplied by the one outside of it;

4(x − 3) − 5(x + 1) = 3

In the equation;

4 distribute over the first parentheses and -5 over the second one;

So we expand;

4x - 13 - 5x -5 = 3

In distributive property, expansion simply takes place.

Which statement must be true to prove j || k?

a.m∠2 + m∠5 = 180

b.∠6 ≅ ∠4

c.∠2 ≅ ∠3

d.∠1 ≅ ∠4

Answers

Answer:

The answer is b. angle 6 must be equal to angle 4.

Question 4
2 pts
If a = -3, b = 2 and c = -4 find the value of the expression.
a2 +b²

Answers

Answer:

-2

Step-by-step explanation:

Order of Operations: BPEMDAS

Step 1: Define

a2 + b²

a = -3

b = 2

c = -4

Step 2: Substitute and Evaluate

2(-3) + 2²

-6 + 4

-2

Answer:

Step-by-step explanation:

1. To participate in a school trip, Kim had to earn $85 in one week. Kim could earn $8 per
hour babysitting and $15 per hour for yard work, but Kim's parents limit work time to 8
hours per week. How many hours should she spend doing each type of work?
a
First define your variables.
b. Write two equations, one that represents the condition on the total number of hours to be
worked and the other which relates the number of hours worked at each job towards her
goal.

Answers

It has given you that to earn $85 in one week. Kim could earn $8 per hour babysitting and $15 per hour for yard work with work time limited to 8 hours per week. Now we have to represent the variable X is the numbers of hours spent doing babysitting in the week. And Y represents the number of hours spent doing yard work in the week. The equation representing the condition on the total number of hours to be worked is: x+y= 8. The equation relating the number of hours working at each job toward the fund- raising goal is: 8x+ 15y= 85 and your final answer should be x= 5

Task: 4 2/3 yards = ? feet
whats the rule

Answers

Answer:

4 2/3 yards = 14 feet

Step-by-step explanation:

1 yard = 3 feet

Emily plans to put her graduation money into an account and leave it there for 4 years while she goes to college. She receives $750 in graduation money that she puts into an account that earned $127.50 in interest. What was the interest rate that the bank provided

Answers

Answer:

887.40

Step-by-step explanation:

amount = principal(1i)^n

i = .0425/2 = .02125 , n = 8 , principal = 750

amount = 750(1.02125)^8 = 887.40

answer plss. Money here.

Answers

Answer:

Both angles are equal because they are corresponding so:

2x + 5 = 3x - 7

2x + 12 = 3x

x = 12

Which represents the solution set to the inequality 5.1(3 + 2.2x) > –14.25 – 6(1.7x + 4)?

Answers

Answer:

The answer is x > -2.5 or (-2.5,infinity)

Step-by-step explanation:

NEED HELP ASAP PLS!!!

A high school club is conducting a cupcake sale at a local fair to raise money for a trip. The club members are baking a total of 444 cupcakes. Each cupcake will sell for 3.00. The display tables cost $75.00 to rent.

Part A:
If n is the Number of cupcakes sold and p is the profit earned, which is the Independent in variable and which is the dependent variable? Explain.

Independent variable:

Dependent variable:

Explain:

Answers

Answer:

independent variable: cupcakes sold

dependent variable: profit earned

explain: no profit earned without cupcakes sold.

Step-by-step explanation:

Answer:

Independent Variable: n = Number of cupcakes sold

Dependent Variable: p = Profit, no profit without the sale of cupcakes

Step-by-step explanation:

Profit depends on the number of cupcakes sold.

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