Answers
Related Questions
Wanna eat some sushi?
Answers
Answer: sure why not
Step-by-step explanation:
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:
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
The following data shows the quarterly profit (in thousands of dollars) made by a particular company in the past 3 years.
Year Quarter Profit ($1000s)
1 1 45
1 2 51
1 3 72
1 4 50
2 1 49
2 2 45
2 3 79
2 4 54
3 1 42
3 2 58
3 3 70
3 4 56
Required:
a. Construct a time series plot. What type of pattern exists in the data?
b. Develop a three-period moving average for this time series. Compute MSE and a forecast of profit (in $1000s) for the next quarter.
Answers
Answer:
208.82 ; 61.33
Step-by-step explanation:
Given the data:
Year Quarter Profit ($1000s)
1 1 45
1 2 51
1 3 72
1 4 50
2 1 49
2 2 45
2 3 79
2 4 54
3 1 42
3 2 58
3 3 70
3 4 56
The 3 period moving average :
Yr Qtr Profit ($1000s)Pt ____ Ft ____ e=(PT-Ft)²
1 _ 1 ___45 __
1 _ 2 __ 51 __
1 _ 3 __ 72 __
1 _ 4 __ 50 ______________56 ____ 36
2 _ 1 __ 49 ______________57.67__ 75.17
2 _ 2__ 45 ______________57 ____ 144
2 _ 3__ 79 ______________48 ____961
2 _ 4__ 54 ______________57.67 _ 13.47
3 _ 1__ 42 ______________59.33__300.33
3 _2 __ 58 ______________58.33__ 0.11
3 _ 3__ 70 ______________51.33__ 348.57
3 _ 4 __56 ______________56.67__0.45
MSE = Σ(Pt - Ft)² ÷ n
MSE = (36+75.17+144+961+13.47+300.33+0.11+348.57+0.75) ÷ 9
= 208.82
Forecast for next quarter :
(58 + 70 + 56) / 3 = 184 /3 = 61.33
Graphically, a point is a solution to a system of two inequalities if and only if the point
lies in the shaded region of the top inequality, but not in the shaded region of the bottom inequality.
lies in the shaded region of the battom inequality, but not in the shaded region of the top inequality.
lies in the shaded regions of both the top and bottom inequalities.
does not lie in the shaded region of the top or bottom inequalities.
Answers
9514 1404 393
Answer:
(c) lies in the shaded regions of both the top and bottom inequalities.
Step-by-step explanation:
A point that is a solution to the system must be a solution to all of the inequalities in the system. It must lie in the shaded regions of both.
Question 1 The solution to 5 - 3x > 35 is either r > -10 or -10 > 2. Which solution is correct? Explain how you know. Edit View Insert Format Format Tools Table 12pt Paragraph BI U AY 2 T?
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Answer:
x < -10
Step-by-step explanation:
Given the inequality 5 - 3x > 35
Subtract 5 from both sides
5 - 3x - 5> 35 -5
-3x > 30
Divide both sides by -3
-3x/-3 < 30/-3
x < -10 (note the change is sign)
hence the correct solution is x < -10
after one side of a square was enlarged by 3 inches and the other side was enlarged by 3 inches, the area of the shape was doubled. what was the side of the square.
Answers
Answer:
The side of original square was 7.24 inches
Step-by-step explanation:
(x+3)(x+3) =2(x)(x)
x² + 6x + 9 = 2x²
reduce:
x² - 6x - 9 = 0
(x + 1.24)(x - 7.24) = 0
x = 7.24
What is the median of the following numbers?
3.31,37,56, 61,57,62
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Answer:
The answer might be 56 because the median is the middle of it
The volume of the rectangular prism pictured below is 520 cm3. The area of the base of the prism is 80 cm What is the height of the prism? A. 440 cm A. 440 cm, , B. 600 cm B. 600 cm, , , , C. 65 cm C. 65 cm, D. 6.5 cm
Answers
Answer:
520 divided by 80 = 6.5
Step-by-step explanation:
In order to find a height you must divide the total area by the given length.
If you get this you will get 30 points 2•2•2•2=
Answers
Answer:
16
Step-by-step explanation:
Answer:
16
Step-by-step explanation:
2×2=4 4×2=8 8×2=16 you multiply each answer by 2
find the geometric mean of 2 and 72
Answers
Answer:
2*72=144
square root of 144 is 12
Step-by-step explanation:
The geometric mean of 2 and 72 is the square root of their product, or 12
Answer:
2*72=144
Step-by-step explanation:
In ΔMNO, the measure of ∠O=90°, MN = 99 feet, and OM = 52 feet. Find the measure of ∠M to the nearest degree.
Answers
Answer:
58 is the answer I got and I think it should be right but yeah math is confusing sometimes lol
Answer:
58
Step-by-step explanation:
I put a screenshot, you do the math
Answers
Answer:
= 1.156 × 10^9
(scientific notation)
= 1.156e9
(scientific e notation)
= 1.156 × 10^9
(engineering notation)
(billion; prefix giga- (G))
= 1156000000
Step-by-step explanation:
Simply subtract A from B = 1,156,000,000 and convert the answer to scientific notation.
Answer:
D. 1.156 times 10^9
First we subtract the difference,
1,300,000,000 - 144,000,000 = 1156000000
Next, we find the number 1156000000 written in scientific notation.
Step 1
To find a, take the number and move a decimal place to the right one position.
Original Number: 115,600,000
New Number: 1.15600000
Step 2
Now, to find b, count how many places to the right of the decimal.
New Number: 1 . 1 5 6 0 0 0 0 0
Decimal Count: 1 2 3 4 5 6 7 8
There are 8 places to the right of the decimal place.
Step 3
Building upon what we know above, we can now reconstruct the number into scientific notation.
Remember, the notation is: a x 10b
a = 1.156 (Please notice any zeroes on the end have been removed)
b = 8
Now the whole thing:
1.156 x 108
Step 4
Check your work:
108 = 100,000,000 x 1.156 = 115,600,000
Thus, 115,600,000 written in scientific notation is 1.156 times 10^9 estimated.
(a) It takes 83 pounds of seed to completely plant a 9-acre field.
How many acres can be planted per pound of seed?
acres per pound
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Find the volume of the figure of 7 inches, 21 inches and 15 inches.
Answers
Answer:
2,205 cubic inches
Step-by-step explanation:
There are 1,000 meters in 1 kilometer. How many kilometers are in 3,600 meters?
HELP
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Answer:
A. 3.6 kilometers
Step-by-step explanation:
1000 meters = 1 km
3600 meters = x km
Set as a ratio:
1000 : 1 = 3600 : x
Then divide:
[tex]\frac{3600}{1000} = \frac{x}{1} = x[/tex]
so 3600/1000 = 3.6 = x
3.6 km
Identify if it's an independent or dependent event and write the probability as a fraction * What is the probability that from a normal 52 card deck, you randomly draw a 3, and then without replacing the 3, you draw the Queen of Hearts?
Answers
Answer: 0.151 percent
Step-by-step explanation:
The probability of any particular outcome is
(number of possible successful outcomes) / (number of total possibilities)
-- On the first draw, there are 52 possible total outcomes, and
only 4 that are successful ... drawing a 3 .
The probability of drawing a 3 from a full deck is ( 4 / 52 ).
-- On the second draw, there are 51 possible total outcomes (the first
card you drew stayed out), and only one is successful ... drawing the
queen of hearts.
The probability of this particular outcome is ( 1 / 51 ).
-- The probability of both of them is
( 4 / 52 ) x ( 1 / 51 ) =
( 4 / 2,652 ) = about 0.151 percent.
At a glass vase store, 8 out of the last 20 vases shipped were chipped.
What is the experimental probability that the next vase shipped will be chipped?
Answers
Answer:
Step-by-step explanation: I have no idea
Diana got back her math quiz but Ms. Signer forgot to calculate her final grade. If the quiz had a total of 20 questions on it, and Diana got four wrong, what was her final grade (written as a percentage)?
Answers
Answer:
She made a final grade of 80% or you could say she got 20% of the questions wrong.
Fatimah wants to estimate the proportion of students at her school who ate breakfast every day last week. She
takes an SRS of 80 of the 1000 students at her school and finds that 20 of those sampled ate breakfast every
day last week.
Based on this sample, which of the following is a 95% confidence interval for the proportion of all students at
the school who ate breakfast every day last week?
Choose 1 answer:
20+ 0.080
20 + 0.095
0.25 +0.080
Answers
Answer:
Answer:
0.25±0.095
Step-by-step explanation:
P^= 20/80=.25
sample size n= 80
z*=1.96
p^± sqr(p^(1-p^)/n)
=0.095
Step-by-step explanation:
The 95% confidence interval for the proportion of all students at the school that ate breakfast every day last week is 0.25 +0.080.
Given thatFatimah wants to estimate the proportion of students at her school who ate breakfast every day last week.
She takes an SRS of 80 of the 1000 students at her school and finds that 20 of those sampled ate breakfast every day last week.
We have to determineBased on this sample, which of the following is a 95% confidence interval for the proportion of all students at the school that ate breakfast every day last week?
According to the questionShe takes an SRS of 80 of the 1000 students at her school and finds that 20 of those sampled ate breakfast every day last week.
[tex]\rm P = \dfrac{Sample \ space}{Total \ SRS}\\ \\ P = \dfrac{20}{80}\\ \\ P = \dfrac{1}{4}\\ \\ P = 0.25[/tex]
Therefore,
The 95% confidence interval for the proportion of all students at the school that ate breakfast every day last week is
=[tex] = 1.96 \times \sqrt{\dfrac{0.25(1-0.25)}{80}}\\ \\ = 1.96 \times \sqrt{\dfrac{0.25\times 0.75}{80}}\\\\ = 1.96 \times 0.40\\\\ = 0.080[/tex]
Hence, The 95% confidence interval for the proportion of all students at the school that ate breakfast every day last week is 0.25 +0.080.
To know more about Confidence intervals click the link given below.
https://brainly.com/question/15682003
Question 9 (5 points) Factor 98zy2 – 50z. O A) 298y + 25)(y + 2) B) 227y - 5)(7y - 5) C) 227y + 5)7y - 5) D) 249y - 5)(y + 5)
Answers
Answer:
i think it might be D
Step-by-step explanation:
..
Roger and Mary have an online account for buying movies. Roger's account balance is -$25
and Mary's is -$10. Who owes more money?
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Answer:
Rodgers simply because owing 25 dollars is more than 10
Please help whatbis the answer
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PLEASE HELP DUE SOON
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Answer:
A
Step-by-step explanation:
The lines cross or touch the X-Axis 4 times which means that there are 4 solutions.
plss helppppppppppppppp
Answers
Answer:
149? I could be wrong I haven't done this type of math in a while.
Step-by-step explanation:
From B to D, that angle would be 180. so 180 - 31 = 149
How do I simplify this
Answers
Answer:
96/18
Step-by-step explanation:
To simplify you need to turn it into an improper fraction. This means that the numerator (the number on top) is greater than the denominator (the number on the bottom). The improper fraction form of 5 6/18 is 96/18. I believe this is the answer to your question.
I hope this helps you!
Please help me with the question
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3 and y are being multiplied and then you add the two!:)
HELP FAST!!!!!!!!!!!!!!
What is the solution to the image?
Answers
Answer:
x=8
Step-by-step explanation:
We have been given with the function:
Here, we have same base of logarithmic function on both sides of the equation.
So, we will equate the values on right hand side and left hand side of the equation we will get
After simplification we will get
After further simplification we will get
Hence,
Therefore the correct answer is 8.
For the linear function ƒ(x) = 7x – 4, find the range of ƒ(x) at x = –2, 0, and 2.
Question 18 options:
A)
ƒ(–2) = –18, ƒ(0) = 4, ƒ(2) = 10
B)
ƒ(–2) = 18, ƒ(0) = –4, ƒ(2) = 10
C)
ƒ(–2) = 10, ƒ(0) = –4, ƒ(2) = –18
D)
ƒ(–2) = –18, ƒ(0) = –4, ƒ(2) = 10
Answers
Answer:
1
Step-by-step explanation:
I need help pls on this problem
Answers
76+950= 1026, which is out of her budget.
What is the value of the expression with g=1.5? 5g^2
Answers
Answer:
15
Step-by-step explanation: