Alex is conducting a survey for a car company. She decides to start by interviewing some people in her neighborhood. She prepares a questionnaire and emails it to 50 neighbors who own cars. Of those neighbors, 24 respond. Why is this sample likely to be biased?
A.
Alex sent a questionnaire by email instead of going door to door.
B.
Alex sent the questionnaire only to those who live near her.
C.
Not everyone who got the questionnaire responded.
D.
Those who got the questionnaire may not have responded on time.

Answers

Answer 1

Answer:

The answer is B

This is because if we know that Alex sent the questionnaire only to those who live near her, we can infer that this is biased.

Answer 2

Answer:

B: Alex sent the questionnaire only to those who live near her

Step-by-step explanation:

Related Questions

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Answers

The median is 4 and the range is 5 the average should be 4.5

The median is where the middle is so if you count on either side until you get to the middle you have the median. The average is all the numbers added up divided by the number of numbers ( you might want to check me incase I typed it in wrong on my calculator. The range is just the highest- the lowest:)
Hope this helps

A spinner is divided into five colored sections that are not of equal size: red, blue, green, yellow, and purple. The spinner is spun several times, and the results are recorded below:
Spinner Results
Color Frequency
Red 2
Blue 10
Green 3
Yellow 19
Purple 20
Based on these results, express the probability that the next spin will land on blue as a decimal to the nearest hundredth.

Answers

Answer:

10/54 = 0.185

Omar divided a circular pizza into 8 equal sections. He gave his friend
3 sections. Explain why the amount he gave to his friend can be represented
by a point plotted to the right of 0 on a number line. Then write the
amount he gave to his friend as a decimal.

Answers

Answer:

the amount he gave his friend is a positive fraction, therefore to the right of 0 on the number line. the decimal is 3/8 which = 0.375

the question is on the picture

Answers

Answer:

Step-by-step explanation:

Just did it

23x+67= 90
solve
free

Answers

Answer:

x=1

Step-by-step explanation:

23x+67=90

23x=23

x=1

Answer:

x=1

hope this helps

have a good day :)

Step-by-step explanation:

If you roll two dice, what is the probability of landing on the numbers 3 and 6?

Answers

1/6 chance to get a 3
1/6 chance to get a 6
1/6 * 1/6 = 1/36
1/36 chance to get a 3 and a 6

Answer:

2/36 or 1/18

Step-by-step explanation:

rolling two dice produces 36 outcomes

rolling a 3 and a 6 is one outcome

rolling a 6 and a 3 is a second outcome

Find the 88 term of the arithmetic sequence 4,-1,-6

Answers

Answer:

an = a1 + d(n - 1)

a88 = 4 + (-5)(88 - 1)

a88 = 4 + (-5)(87)

a88 = 4 - 435

a88 = -431

So, the 88th term of the arithmetic sequence is -431.

A woman bought a bag of rice for $5700 and in 3 weeks later,she could only buy 3/4 of a bag for $5700. Find the percentage increase.

Answers

Answer: 25%

Step-by-step explanation:

3/4x=5700

x = 7600

7600 - 5700 = 1900

19/76 = 25/100 which is 25%

Hope this helps!

hi again :) it's me again

Answers

Answer:

Heyyy

Step-by-step explanation:

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kelly bought some stuff animals for $6.49 each. she also got a box of chocolate for $8.32. she payed a total of 27.79 write an equation to find how many stuffed animals kelly purchased (use s for the variable)

Answers

Answer:

Step-by-step explanation:

first, i'm pretty sure that there's only one box of chocolates as stated in the problem, but if there's more i'm sorry.

you can use this equation:

6.49x + 8.32=27.79

remember not to use dollar signs in the equation! only use dollar signs in your answer - so don't use dollar signs now, unless specified by your teacher or guider ;)

hope this helped!!!

please help, no fake answers and please...

Write an equation to model the relationship between the number of weeks, x, and the number of views, f(x).
Enter the correct answer in the box by replacing the values of a and b.

Answers

Answer:

a = 5120

b = 1.25

Step-by-step explanation:

Let the exponential function representing the given table is,

f(x) = [tex]a(b)^x[/tex]

Here, f(x) = Number of views

x = Number of weeks

We choose two points from the given table and satisfy the equation of the function.

Let the points are (0, 5120) and (1, 6400)

For a point (0, 5120),

f(0) = a(b)⁰ = 5120

a = 5120

Now for the second point (1, 6400),

6400 = 5120(b)¹

b = [tex]\frac{6400}{5120}[/tex]

b = 1.25

Therefore, a = 5120 and b = 1.25 are the values.

Answer:

f(x)=8(0.5)^x

Step-by-step explanation:

louise decided to purchase a new mountain bike when he saw the sporting good store was offering 20% off their bike. what is the total cost of the mountain bike if the originally price at $249 and louise must pay 7.5% sales tax

Answers

$215.13

First off $249 x 20% = $49.8 so, $249- 49.8 = 199.2 ( the price after deducting the discount), 199.2 x 8% = 15.93 (this is the price of the tax), and 199.2 + 15.93 = $215.13 ( this is the price after the discount and with taxes) :D

Coach Miguel bought 3 identical soccer balls for his soccer team. After applying a $25.00 store gift card, his total was $13.97. Which equation can be used to calculate by the price of each soccer ball?
A 3b - 25 = 13.97
B. 3b + 25 = 13.97
C. 1/3b - 25 – 13.97
D. 1/3b + 25 = 13.97

Answers

Answer:

F the person that Post the question

Step-by-step explanation:

He said he couldn’t give me the answer because we went to different schools like who does that

Is this a function?
A) yes
B) No

Answers

Answer:

Step-by-step explanation:

Graph the function y = 6 – 2x. Click the intercepts to show the coordinates.

Answers

Answer:

Step-by-step explanation:

Let's find and use the intercepts. They speed up graphing of lines.

y-intercept: In y = 6 – 2x, let x = 0. Then y = 6, and the y-intercept is (0, 6).

x-intercept: In y = 6 – 2x, let y = 0. Then 2x = 6, and x = 3. The x-intercept is therefore (3, 0).

Plot these two points and then draw a line through both.

I need this rn plssss

Answers

Answer:

please u solve friendly and u solve eassy ok....

Step-by-step explanation:

please mark me as branilist... ok

can someone solve this by factoring? i need to show work but don't really understand what we're doing..

the problem is:

Answers

Answer:

The answer is x = -7 and x = -8

Step-by-step explanation:

(4.5)x = 26 pls help me with this it is multiplication equations

Answers

Answer:

x=5.7

Step-by-step explanation:

Answer:

x = 5.78

Step-by-step explanation:

(4.5)x = 26

4.5x = 26

x = 26/4.5

x = 5.78

I saw a rectangular floor is 42 M long and 39 meters wide how many square meters of flooring do they need ?

Answers

Answer: 81 I guess

Step-by-step explanation: (empty)

Answer:

1,638

Step-by-step explanation:

Area equation=Lenngth*Width

42*39=1,638sq. M

The crime scene with dimensions below is being taped off. If each roll of tape
is 50 feet long, how many rolls are needed to tape off the scene?

Answers

Answer:

Step-by-step explanation:

Answer:

the answer is 4 rolls of tape

Step-by-step explanation:

basically just be good and thats all ur welcome

Help please homework

Answers

Answer:

Y=7

Step-by-step explanation:

(X,Y) or (-2,?)

X=-2

4×(-2)-4y=20

-8-4y=20

-4y=20+8 /÷(-4)

Y=7

PLEASEE HELPP!!! DUE TODAYY!!!

Answers

Answer:

b 5/12

Step-by-step explanation:

5x + 7y = 25
5x - 2y = -65
solve using elimination
(step by step please)

Answers

5x+7y=25

5x-2y=-65

subtract both of the equations

5x-5x=0

7y--2y= 7y+2y=9y

25--65=25+65=90

0+9y=90

9y=90

divide both sides by 9 to get y by itself

9y/9=90/9

cross out 9 and 9 which becomes 1*1*y=y

90/9=10

y=10

find x by using the substitution method

5x+7y=25

5x+7(10)=25

5x+70=25

move +70 to the other side

sign changes from +70 to -70

5x+70-70=25-70

5x=-45

divide both sides by 5 to get x by itself

5x/5=-45/5

cross out 5 and 5 then becomes 1*1*x=x

-45/5=-9

x=-9

answer:

(-9,10)

Mhanifa can you please help? I will mark brainliest!

Answers

Answer:

Given function

h(x) = 2x - 1

#15 Find the inverse of h(x)

Substitute x with y and h(x) with x and solve for y:

x = 2y - 12y = x + 1y = 1/2x + 1/2

The inverse is:

h⁻¹(x) = 1/2x + 1/2

#16 The graph with both lines is attached.

The x- and y-intercepts of both functions have reversed values.

#17 Table of the inverse function will contain same numbers with swapped domain and range.

Initial look is like this:

x | -3 | -2 | -1 | 0 | 1 | 2 | 3h⁻¹(x) | -1 | | 0 | | 1 | | 2

The rest of the table is filled in by finding the values:

x | -3 | -2 | -1 | 0 | 1 | 2 | 3h⁻¹(x) | -1 | -0.5 | 0 | 0.5 | 1 | 1.5 | 2

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Answers

Answer:

Step-by-step explanation:

A fine fabric was selling for $10.50 per half yard. Joni bought 2 1/3 yards. How much did he spend? Brainliest for correct answer.

Answers

Answer:

45.5

Step-by-step explanation:

First you would find 1/3 third of 10.50 and it is 3.5, you would then do 10.50 x 4 since it said 10.50 per half a yard, so you would do times 4 and you would get 42, you would then add 42 + 3.5 which equals 45.5.

Answer:

$24.50

Step-by-step explanation:

10.50 * 2 1/3 = 24.50

I would appreciate brainliest, have an amazing day

simplify. -4x^2-5(x+3)+x^2

Answers

-4x^2-5(x+3)+x^2 :

-4x^2-5x-15+x^2

-3x^2- 5x -15

Can someone please help me with this math problem please:):)

Answers

Answer:

y = 126° + 29° = 155°

Step-by-step explanation:

I think this may be a solution:

126°+29°=155°

So, y=155°

Are both of theses sets of orderd pairs a function? {(4,2) (3,15) (2,18) (1,21)} {(-6,8) (-3,4) (3,0) (6,-4)

Answers

Answer:

yes!

Step-by-step explanation:

If you can create 1 item in 3/4 hr how many can you create in 8 hrs

Answers

Answer:

10.6, or 10 entire items

Step-by-step explanation:

Answer:

[tex]\frac{32}{3}[/tex] items

Step-by-step explanation:

Please see the attached image.

I hope this helps!

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