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A researcher would like to study the relationship between average fuel economy (measured in miles per
gallon) and fuel type (premium, regular unleaded, and E85). He randomly selects 90 vehicles of various
makes and models, including compact cars, full-size cars, and trucks. All of the selected vehicles have
been driven less than 6,000 miles before the experiment.
a) Does this experiment use a control group? Explain.
b) Suppose the researcher would like to use a completely randomized design. Explain how the
researcher should assign the 90 vehicles to the three fuel types.
c) An advisor to the researcher suggests using a randomized block design. Should the researcher
block on type of vehicle (compact cars, full-size cars, and trucks) or number of miles previously
driven (0–2,000 miles; 2,000–4,000 miles; and 4,000–6,000 miles)? Explain your choice of
blocking variable

Answers

Answer 1

Answer:

Step-by-step explanation:

Answer 2

The Discussion to all points are shown below:

What is Survey?

In order to gather information about a service, product, or process, a survey is described as the act of looking at a process or questioning a predetermined sample of people. Surveys used to gather data ask a specific set of people about their beliefs, actions, or knowledge.

Given:

a) No, there isn't a control group in this trial. This is evident from the fact that all of the gasoline tyres are being evaluated in all of the different automobile types; no specific group is under supervision.

b )In order to randomly assign Groups 1, 2, and 3 to each of the three feel kinds, the researcher should utilise a computer generator to run through the 90 generators.

c) Miles driven should be used as a criterion for blocking rather than vehicle type because the latter could have an impact on fuel economy.

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Related Questions

Del has 12 less than 3 times the number of comic books as Patrick. Del has at most 57 comic books. What solution represents the number of comic books, b, Patrick can have?

Answers

Answer:

Del has 19 comic book

Step-by-step explanation:

to figure this out we need to take 57 and divide by the 3 given.

57 ÷ 3 = 19

so because we divided 57 by 3 we know the answer is 19

Del has 19 comic books

Which gives the prices in order, from least to greatest unit rate? Price B, Price A, Price C Price C, Price B, Price A Price C, Price A, Price B Price B, Price C, Price A

Answers

Answer:

Price B, Price A, Price C

Step-by-step explanation:

Look at the table showing different prices for oranges.

Prices for Oranges

Price A

$2.25 for 6

Price B

$1.30 for 4

Price C

$0.97 for 2

Which gives the prices in order, from least to greatest unit rate?

Price B, Price A, Price C

Price C, Price B, Price A

Price C, Price A, Price B

Price B, Price C, Price A

Price A

$2.25 for 6

Price per orange = $2.25 / 6

= $0.375

Price B

$1.30 for 4

Price per orange = $1.30 / 4

= $0.325

Price C

$0.97 for 2

Price per orange = $0.97 / 2

= $0.485

From least to greatest unit rate

Price B , price A, price C

Ur answer is A, person on top of me is right

Rewrite the following equation in slope-inte
Rewrite the following equation in slope-intercept form. y−8 =13(x+6)

Answers

Answer:

y = 13x + 86

Step-by-step explanation:

y−8 =13(x+6); distribute the 13

y - 8 = 13x + 78; now add 8 to both sides

y = 13x + 86; this is the slope intercept form

Jonas went to the store and bought 2 boxes of cereal for $2.79 each, a box of fruit snacks for $1.89, a gallon of milk for $3.19. Sales tax was $1.05. If Jonas pays with a 20-dollar bill, how much change will he receive

Answers

Answer:

$8.29

Step-by-step explanation:

2(2.79) + 1.89 + 3.19 = 10.66

10.66 + 1.05 = 11.71

20 - 11.71 = 8.29

can i get a thanks and brainliest please?

Whats the slope ? Please answer

Answers

Answer:

slope = 1

Step-by-step explanation:

slope = rise over run

1 rise for every run

y = x +1

There’s a [Picture] can you guys help me!!?

Answers

Answer:

x<32 (i thik is what you want)

Step-by-step explanation:

if x/8+1<3

x has to be less the 4*8, which is 32.

so x<32

Also I’m not really sure how to find the value of x for this any help would be lovely

Answers

Answer:

x = 25

Step-by-step explanation:

The other angle in the triangle would equal 130 because the sum of angles in a triangle add up to 180.

2x + 130 = 180 because it is a linear pair

2x = 50

x = 25

Answer:

x = 25

Step-by-step explanation:

Right triangle ABC is transformed into right triangle A'B'C what is the scale factor of dilation

Answers

Answer:

D. 3

Step-by-step explanation:

The scale factor used to transform right triangle ABC into right triangle A'B'C' is the ratio of any corresponding side length of ∆A'B'C' and ∆ABC.

Thus, using the ratio of side length A'B' to side length A'B', we can get the scale factor as follows:

A'B' = 12 - 6 = 6 units

AB = 4 - 2 = 2 units

Scale factor = A'B' : AB = 6 : 2 = 6/2 = 3

Kelsey has a new baby brother! He weighs 8 lbs 3 oz. The doctor said the baby should gain about 5 ounces per week. At that rate, how much should the baby weigh-in 3 months (12 weeks)?

Answers

Equation: 0.5x + 8.3
Plug in 12 for x and solve

Write a rule for the nth term of the arithmetic sequence. 34, 41, 48, 55, . . .

Answers

Answer:

              [tex]\bold{a_n=7n+27}[/tex]

Step-by-step explanation:

[tex]a_1=34\\a_2=41\\a_3=48\\a_4=55\\\\41-34=7\ \ and\ \ 48-41=7\ \ and \ \ 55-48=7[/tex]

So this is the arithmetic sequence with difference d=7

[tex]a_n=a_1+d(n-1)\\\\a_n=34+7(n-1)\\\\a_n=34+7n-7\\\\\underline{a_n=7n+27}[/tex]

-19.86 as A Fraction: How did you do it?
Need Help Please!!

Answers

Answer: -993/50 or -19 43/50

Step-by-step explanation:

-19.86 = -19 86/100

-19 86/100 = -19 43/50

or -993/50

Emma always learned that when you multiply by a power of ten, all you need to do is add a zero. She used that trick to solve the following problems:

345 x 10 = 3,450
4,789 x 100 = 478,900
5.6 x 10 = 5.60

Emma’s sister told her that her “trick” doesn’t work, and that 5.6 x 10 is NOT 5.60.
Which girl is correct? How do you know?


help meee plsss you smart people

Answers

Answer:

Her sis is right

Step-by-step explanation:

She is correct because if you multiply a decimal by a power of 10 instead of adding a zero you bring numbers out of the decimal state.

Answer:

Emma's sister is correct

Step-by-step explanation:

When you multiply by a power of ten you are actually just moving the decimal (which in a whole number you don't see) to the right so when it's a whole number yes you just add a zero but in this instance the answer would be 56.

I don’t know how to do this

Answers

Answer:Umm, its upside down, so if you post a new question with it right side up then i will be glad to help you!

Step-by-step explanation:Im bored...

I don’t understand it’s upside down

What is 2 7/8 times 4 1/3

Answers

Answer:

12.4583333333

Step-by-step explanation: spero t ayude

Answer:

12 11/24

Step-by-step explanation:

23/8*13/3= 299/24 which is 12 11/24

The anderson family has many pets.They have 5 dogs,3 cats, and 2 rabbits.The ratio compare the number of rabbits to the number of dogs is _____ to _____

Answers

Answer: 2:5

Step-by-step explanation: There are 2 rabbits and 5 dogs.

Identifying values in the domain, probs really easy for you!

Answers

Answer:

Not

Not

In domain

Step-by-step explanation:

u cannot square root a negative number as you'll get a complex number, making h(x) undefined


8x - 5y = -6
6x + 2y = -16

Answers

Answer:

both x and y are -2 in this case

Complete the like terms to create an equvalent expression:
-4r - 2r + 5

Answers

-6r+5
the two like terms are the ones with R. combine -4r and -2r to get -6r

An animal shelter currently has 40 cats in it. Next month they expect the number of cats to increase by 15% over the number this month. Which of the following is the number of cats they expect next month

Answers

Answer:

46

Step-by-step explanation:

15% of 40 is 6 so you add 6 to 40

Answer:46

Step-by-step explanation:

15% of 40=?

multiply 15 by 40 and divide by 100

15 * 40 / 100 = 6

add 6 to 40

40+6=46

Therefore, the number of cats that they expect is 46.

solve as multi step eqaution 42 = 3(2y - 4)

Answers

It is 9 bro mental math

A soccer coach filled a water cooler with 34.07 liters of water before a game. The players drank 29.6 liters during their game. How many liters of water were left in the cooler?

Answers

Answer:

4.47 liters

Step-by-step explanation:

To find how many liters were left, subtract the amount they drank from the original amount:

34.07 - 29.6

= 4.47

So, there were 4.47 liters of water left in the cooler.

After players drank 29.6 liters of water from 34.07 liters there is 4.47 liters of water left in the cooler.

What are some alternative names for arithmetic operations?

Addition is also known as the sum, subtraction is also known as the difference, multiplication is also known as the product, and division is also known as the factor.

Given, A soccer coach filled a water cooler with 34.07 liters of water before a game.

The players drank 29.6 liters during their game.

∴ Liters of water that is left in the cooler is the difference between water-filled before the game to the water drank by players during their game which is,

= (34.07 - 29.6).

= 4.47 liters are left in the cooler.

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Joyce paid $70 for an item at the store that was 70% off the original price. What was the original price?

Answers

Answer:119

Step-by-step explanation:

Write as a sentence as a proportion. Then solve the proportions 5 is to 12 as is to 48

Answers

5:12

x:48

the answer is 20

i will give all my points to whoever can type a lot and i mean a lot of digits from pi

Answers

Answer:

pi 3.1428571428571142

A swing set was originally priced at $920, but Desmond waited to buy it until the swing set was on sale for 25% off. If he paid 10% sales tax on the sale price, how much did he pay in total?

Answers

$759 total. 25% of $920 is $230. 920-230= $690. 10% of 690 is $69. $690+$69 = $759.

Question 4
Mr Tilman took a taxi to Center City The taxi driver charged a S4 Initial fee and $2 for every mile. The final cost of the taxi ride was $28 Which equation models this situation and is solved correctly to determine
the number of miles x, the taxi traveled?
А 4 + 2x = 28; = 12
В
С
2 + 4.x = 28; x = 6.5
4 + 2x = 28; = 16
2 + 4.c = 28; 2 = 7.5
D

Answers

Answer:

4 + 2x = 28; = 12

Step-by-step explanation:

Start with the initial fee which is $4. Then times 2 with your miles for an example: (money with miles)2 x 6(miles) and you should have $12 dollars in total  2 x 4 which equal $8 and 2x2 which equal 4...

2 x 6 = 12

2 x 4 = 8

2 x 2= 4

add all those up and you should get 28..

To check your work do

4 + 2(12) = 28

4 + 24 + 28

Your Welcome!

Which of the following list Is in order from smallest to largest? 1/2 7/11 5/7 2/3
1/2 2/3 5/8 7/11
1/2 5/8 7/11 2/3
7/11 1/2 5/8 2/3

Answers

Answer:

Step-by-step explanation:

im so sorry i dont no this answer

37. The volume of a box is 1344 cubie mches or in
a. How many cubic inches are in one cubic foot? Justify your answer
b. What is the volume of the box in cubic feet" Justify your answer

Answers

Answer:

Step-by-step explanation:

there are 1728 cubic inches in one cubic foot.

A cubic foot is 12"

12* 12" * 12" = 1728 cu/inches

therefore

1344/1728 =. 78 cu ft

Which decimal is less than 0.8 and greater than 0.02?
 A. 0.81
 B. 0.46
 C. 0.86
 D. 0.006

Answers

Answer:

the answer would be d

which is 0.006

PLS HELPPP I WILL GIVE BRAINLYISTT!!!!!

Answers

Answer:

a) 3/5, 60%

b) 1/15, 0.07

c) 9:1, The ratio means that Jack had spent 9 times more money on shoes than on music, 9/1

Step-by-step explanation:

a) The ratio would be 45:75, simplifying that would be 3/5. Now,  3 divided by 5 is .6, which would be 60%.

b) This ratio would be 5:75, simplifying that would be 1/15. 1 divided by 15 is 0.0666666. Rounding it to the nearest hundreth would get you 0.07

c) The ratio of shoes money and music money would be 9:1. You can find this by making the denominators of each of the fractions the same, so 3/5 multiplied by 3 gets you 9/15. Now, you can easily compare them.

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