Suppose that Violet is conducting a study to determine whether there is a relationship between the time a person spends running and the number of calories that he or she burns. She selects a random sample of 40 runners between the ages of 18 and 24 and records the time that each person ran and the number of calories that each person was able to burn while running. At the end of her study, she finds that people who were able to run for longer times burned more calories.
(a) What type of study is this? Briefly explain
(i) Experiment
(ii) Observational study
(iii) Survey
(b) What is the explanatory variable? Is it categorical or quantitative?
(c) What is the response variable? Is it categorical or quantitative?
(d) Which of the following is a potential lurking variable in this study? Defend your selection (i.e. explain why it is a lurking variable).
(i) the time each person ran
(ii) the number of calories each person burned
(iii) the age of the runners (iv) the speed at which each person ran

Answers

Answer 1

Answer:

A. observational

B. Time spent running

C. Calories burnt

D. Speed person ran

Step-by-step explanation:

A. This is an observational study as these selected runners are being observed but no experiment is being carried out

B. The explanatory variable or independent variable is the I'm the individuals spend running. This is quantitative.

C. The response variable Is the amount of calories that is being burnt. This is also quantitative.

D. The lurking variable is iv. It is the speed at which each person ran


Related Questions

In ΔFGH, f = 35 inches, g = 20 inches and h=30 inches. Find the measure of ∠H to the nearest degree.

Answers

9514 1404 393

Answer:

  59°

Step-by-step explanation:

The law of cosines tells you ...

  h² = f² +g² -2fg·cos(H)

Solving for angle H gives ...

  H = arccos((f² +g² -h²)/(2fg)) = arccos(725/1400) ≈ 58.811°

  ∠H ≈ 59°

Answer:

100

Step-by-step explanation:

it just is

A crew of highway workers paved 9 mile in 20 minutes. If they work at the same rate, what portion of a mile
Will they pave in one hour?

A-1/150

B-2/45

C-2/5

D-5/2

Answers

-2/45.

Step-by-step explanation:

9 times 3 gives you 27 miles a hour. We are not done though. Now we have to find the  portion of a mile  they pave in one hour  would be -2/45, which is B.

In ΔTUV, t = 560 inches, v = 400 inches and ∠V=19°. Find all possible values of ∠T, to the nearest degree

Answers

Answer:

27 and 153 degrees

Step-by-step explanation:

Delta math

How many edges does the following shape have?

Answers

Answer:

It has 8 edges

Hope that helps!

Find the measure of a 2.
45 135
62 = [?]

Answers

Answer:

45

Step-by-step explanation:

Calculate the unit rate. Label your work properly. Show your fraction work.

Math question : eating 3/4 pizza in 5/6 hour

Answers

Answer:

(9/10) of a pizza per hour.

Step-by-step explanation:

(3/4)*4=3

(5/6)*4= 3hr 20 mins

[3 (1/3)] / [3 (1/3)]=1

3 / [3 (1/3)]= 0.9

3/4. 5/6 hr
x. 1hr
x=3/4 •1 ÷ 5/6
x=3/4 • 6/5
x=18/20
x=9/10
Rate is 9/10 of pizza in one hour

$13,000 is deposited into a savings account with an annual interest rate of 3% compounded continuously. How much will be in the account after 5 years?

Round to the nearest cent.


$15,106.00

$15,103.85

$43,714.05

$66,979.54

Answers

Answer:

15,103.05

Step-by-step explanation:

Total amount in the saving account after 5 years in which the  annual interest, compounded continuously, is $15,103.85.

What is compound interest?

Compound interest is the amount charged on the principal amount and the accumulated interest with a fixed rate of interest for a time period.

The formula for the final amount with the compound interest formula can be given as,

[tex]A=P\times\left(1+\dfrac{r}{100n}\right)^{nt}\\[/tex]

Here, A is the final amount (principal plus interest amount) on the principal amount P of with the rate r of in the time period of t.

$13,000 is deposited into a savings account with an annual interest rate of 3% compounded continuously.

The amount in account after 5 years can be calculated with the above formula as,

[tex]A=13000\times\left(1+\dfrac{3}{12\times100}\right)^{12\times5}\\A=15101.02[/tex]

The total amount in the saving account after 5 years in which the  annual interest, compounded continuously, is $15,103..85.

Learn more about the compound interest here;

https://brainly.com/question/24274034

. A uniform distribution is having the following shape ___.
A. bell-shaped C. bimodal
B. rectangular D. triangular

Answers

Answer:

B. rectangular

Step-by-step explanation:

A distribution is called uniform if each outcome has the same probability of happening.

In this case, the shape of the distribution is rectangular, as each outcome has the same probability of happening. So the correct answer is given by option B.

Which expression has a negative value?


−5⋅5⋅−5⋅−5⋅−5

−5⋅5⋅−5⋅−5

−5⋅−5⋅5

−5⋅−5

Answers

Answer: The answer would be B

Step-by-step explanation:

I had a test like this so I kinda know wut the answer is a few weeks or so ago but u need to multiply -5 • 5 (which would be negative since it has one negative sign) then multiply -5 • -5 (since it has another negative it’s positive) then u just multiply the answers that u got from the times 5 u did -bonus if it’s 1 negatives it’s a negative but if it’s 2 negatives it’s a positive

Answer:

The answer is B

Step-by-step explanation:

Please help me out!!

Answers

Answer:

294cm²

Step-by-step explanation:

Given the formula for surface area expressed as 6L^2

TSA = 6L²

Given that L = 7cm

Substitute

TSA = 6(7)²

TSA = 6 * 49

TSA = 294cm²

Hence the total surface area is  294cm²

plz help me this work is hard​

Answers

The correct answer is D.

A single card is drawn from a standard deck of cards. Find the probability if the given information is known about the chosen card. (Enter the probability as a fraction.) P(queen|black)

Answers

Answer:

[tex]\frac{1}{13}[/tex]

Step-by-step explanation:

Given: A single card is drawn from a standard deck of cards.

To find: P(queen | black)

Solution:

Probability refers to chances of occurrence of any event.

Use the formula: P(A | B) = P(A∩B) ÷ P(B)

Let A denotes the event that the card drawn is queen.

Let B denotes the event that the card drawn is black.

Total number of cards = 52

Probability = Number of favorable outcomes ÷ Total number of possible outcomes

P(queen ∩ black) = P(card drawn is black and queen)

= [tex]\frac{2}{52}=\frac{1}{26}[/tex]

P(black) [tex]=\frac{26}{52}=\frac{1}{2}[/tex]

Therefore,

P(queen | black) = P(queen ∩ black) ÷ P(black)

= [tex]\frac{\frac{1}{26} }{\frac{1}{2} }=\frac{2}{26}=\frac{1}{13}[/tex]

Question 1:
A bag contains 5 black marbles, 7 blue marbles, 3 green marbles, 4 red marbles, and 1 white marble. A marble is selected and then replaced. What is the probability of selecting a black marble?


A 1/5

B 1/4

C 1/20

D 5




Question 2:
Mark has a bag of pink, blue and white gumballs. He randomly selects a gumball from the bag 30 times and records the color of the gumball each time. Before he selects another gumball he replaces the gumball he has already selected. The results are summarized in the table below.

Pink Blue White
Number of Times 8 12 10

Based on these results, determine whether each statement is True or False.

A The experimental probability of pink is 0.8

True
False

B The experimental probability of blue is 0.4

True
False

C It is more likely that Matk will select a blue gumball than a white gumball

True
False



Question 3:
When students line up in the cafeteria, they can choose their main course, drink, and dessert. For the main course students can choose a hot dog, burger, or pizza. For the drink they can choose between water, milk, or soda. And for the dessert they can choose cake or ice cream. The tree diagram shows all possible combinations of meals. Choose two correct answers below.



A The probability of randomly choosing pizza and cake is 3/18
Correct
Incorrect


B The probability of randomly choosing a hot dog, water, and ice cream is 1/3
Correct
Incorrect


C The probability of randomly choosing a burger and water is 1/18
Correct
Incorrect


D The probability of randomly choosing a burger, water, and cake is 1/18
Correct
Incorrect

E The probability of randomly choosing pizza is 1/18
Correct
Incorrect


100 points are awarded to the ones how answer right

Answers

Answer:

A 1/5

Step-by-step explanation:

5x-y=-6
y=-7x+6

find y and x and show work

Answers

Answer:

5x-y=-6.............1

y=-7x+6...........2

substituting value of y in equation 1

5x-(-7x+6)=-6

5x+7x-6=-6

12x=0

x=0/12=0

substituting value of x in equation 1

5×0-y=-6

y=6

What is the value of the expression (2^4)^2

Answers

Answer:

256

Step-by-step explanation:

calculator app

Use calc app on ur phone

Look at the graph of the functions. Given the original function, what is a possible equation for the translated function, g(x)?

Answers

where’s the graph i can’t see it

Answer: c

Step-by-step explanation:

1/4 rotation counterclockwise

Answers

Answer:

I think 9? form 12 counterclockwise

Can someone help me out with this one I will give 20 points

Answers

Answer:

8(4k-12)

Step-by-step explanation:

you can really only check and guess here and it happens to be the second choice 8(4k-12)

8(4k-12)

32k -96

Find the surface area of each solid. Round to the nearest tenth if necessary.
8 ft
6.97
8 fi
18 ft
8 ft
the surface area is
sq. ft.

Answers

Answer: 993.6

Step-by-step explanation:

height*base*depth=Area

8*6.9= 55.2

55.2*18= 993.6

Sorry if i gave you the wrong answer, I am super sorry

An electronics store is having a 15% off sale. Suppose the sale price(p) of a laptop is $495. Which statement are true for this stuation
A. P+ 0.15p represents the sales price
B. P- 0.15p represent the sales price
C. 0.85p represents the sales price
D. The sale price is 420.75
E. The sale price is 569.25


Please just give me the answer choices by the letter and not a photo i will give 15 points

Answers

Answer:

B, C, and D are true. 0.15price is 15% subtracted, 0.85 is with 15% subtracted, 420.75 is the sale price calculated.

GUYS DONT GO TO THIS LINK

https://www.adultpayperview.com/dispatcher/frontDoor?theaterId=7021&genreId=101&locale=en

Answers

Answer:

ok

Step-by-step explanation:

Answer:

alright thank you for the warning :)

Step-by-step explanation:

If Saanvi paid $20.80 for a large pizza from Round Table after using a 20% coupon, what was the original price of the pizza? Please help

Answers

Answer:

$24.96

Step-by-step explanation:

20% of 20.80 is 4.16.

20.80 + 4.16 is 24.96. Boom. Done.

3x^2+5x-28=0 solve this for me please

Answers

Answer:

x= 7/3

x=-4

Step-by-step explanation:

Use the quadratic formula

a= 3, b=5, c=-28

-5± [tex]\sqrt{5^2-4*3(-28)}[/tex]

x= _________________

              2.3

Simplfy

[tex]x=\frac{-5+19}{6} \\x=\frac{-5-19}{6}[/tex]

find the cost of painting square board of size 36 CM at the rate of $4 per square centimetre​

Answers

the sum would be 144 cause you would multiply 36 by 4

i need this right now not later not 2 days later now​

Answers

Answer:

2x+90+x=180 linear pair

3x=180-90

x=90/3=30

HELP PLEASE WILL GIVE BRAINLIST, I DONT HAVE MUCH TIME.IF I PASS THIS I GET TO GO TO DISNEY

Answers

Answer: 41

Step-by-step explanation:

I think it’s forty one because each child painted one and there are forty one flower pots. Besides that much information wasn’t given so it is most likely 41 sorry if it wasn’t much help

Find the measure of <2.
62 = [?]

Answers

Answer:

63°

Step-by-step explanation:

They are corresponding angles.

Which fraction is less then 1/3 or 1/5

Answers

Answer:

1/12

Step-by-step explanation:

it is correct i know  it is

Answer: 1/5 is

Step-by-step explanation:

1/5 = 0.2

1/3 = 0.333

The volume of a cube is 125 inches cubed. What is the length of each side?​

Answers

Answer:

5

Step-by-step explanation:

Explanation: All the edges of a cube have the same length, and the volume of a cube is the length of an edge taken to the third power. So the length of the edge of a cube with a volume of 125 is 5.

Find the measure of 44.
131
49
49
64 = [?]

Answers

Answer:

49

Step-by-step explanation:

alternate angles hope this helps

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