A researcher was interested in knowing whether the mean weight of the second baby is higher, lower, or about the same as the mean weight of the first baby for women who have at least two children. She selected a random sample of 20 women who had at least two children and asked for the weights of the first two at birth. She found that the mean of the differences (first - second) was 5 ounces, and the standard deviation of the differences was 7 ounces.

Required:
a. Why was the researcher's study design better than taking independent samples of mothers and asking the first sample about the weight of their first baby and the sec_ and sample about the weight of their second baby?
b. Define the parameter of interest. Use appropriate notation.
c. Write the mean of 5 ounces and the standard deviation of 7 ounces using appropriate statistical notation.
d. Find a 90% confidence interval for the parameter that you defined in part (b). Write a sentence or two interpreting the interval.

Answers

Answer 1
You want someone to do all that work for you??

Related Questions

am i correct if not pelase hep

Answers

Answer:

Step-by-step explanation:

12 feet

14. The Manilow family paid their electric bill using balanced billing all last year. The monthly
payment was m dollars. At the end of the year, the electric company told them they used more
electricity than they were billed for, and they owed d dollars. Express the value of the electricity
used by the Manilows last year algebraically.
Z

Answers

Answer:

12mx

Step-by-step explanation:

Given that

The monthly payment was m dollars

And, they used more electricity

We need to determine the value that should be expressed in algebraically

The Monthly payment is m dollars

Using balance billing, it would be mx dollars

So, the equation is

= mx × 12

= 12mx

hence, the same would be relevant and considered too

Find the area of the figure.

PLS I NEED HELP FAST!

Answers

55 ft

base + base2 / 2 x h

Ill give brain just helpppp

Answers

Answer:

Hey, gm!

Step-by-step explanation:

With what? Let me know :)

Have a nice day <3

what do you need help with?! would be happy to help

Which of the following rules describes the function graphed below?
Output = Input
Output = 2 • Input − 1
Output = Input + 2
Output = 3 • Input − 2

Answers

Answer:

Output= 3 • Input - 2

Step-by-step explanation:

x     |      y

3 • x - 2

--------------

1      |     1

2     |     4

3     |     7

4     |    10

Answer: last option - output=3 · input - 2

Step-by-step explanation:

Not sure if this is the answer?

Answers

Answer:

x = 16

Step-by-step explanation:

Based in the tangent-secant theorem, we have the following equation showing the relationship between the secant and the tangent:

(2 + x)*2 = 6²

4 + 2x = 36

Subtract 4 from both sides

2x = 36 - 4

2x = 32

Divide both sides

2x/2 = 32/2

x = 16

DE is a midsegment of ABC . Find the value of x.​

Answers

Answer:

if from a to e is 6 un, then x maybe 6 un as well

Step-by-step explanation:

Carl is buying a couch for $650
with a sales tax rate of 7.5%. How
much will Carl spend on sales tax?

Answers

Answer:

All you have to do is find out what 7.5 percent of 650 is.

Step-by-step explanation:

The answer would be 48.75 in sales taxes

48.75 in sales tax! tell me if im right or wrong lols

b. If the radius of a circle is r сm, what
is the measure of its circumference?​

Answers

Answer:

[tex]2 \times \pi \: \times r[/tex]

is the circumference of the circle

Answer:

Step-by-step explanation:

If the radius of a circle is r cm then

circumference = 2πr

2. Ask. Which of the following statements should occur?
A. x = 6:
B. x <3:
C. x> 0:
D. x ^ 2 x:
F. Leave the question unanswered

Answers

F is the answer
Step by step exploration

Use the rules for long divisions to divide 262by9

Answers

Answer: 29. 1

Step-by-step explanation:

PLEASE HELP ME TO ANSWER THIS QUESTION.

A right pyramid PQRST has a rectangular base QRST. Given
that W is the midpoint of QS and RT, the lengths of QT = 8 cm,
TS = 6 cm and point P is vertically above point W, calculate
(a) PT, in cm, if PW = 12 cm
(b) the value of < PTR [angle PTR]

THANK YOU!!!​

Answers

Answer:

(a) PT = 13 cm

(b) <PTR = [tex]39.7^{o}[/tex]

Step-by-step explanation:

(a) Applying the Pythagoras theorem to QST, we have;

[tex]QS^{2}[/tex] = [tex]ST^{2}[/tex] + [tex]QT^{2}[/tex]

      = [tex]6^{2}[/tex] + [tex]8^{2}[/tex]

[tex]QS^{2}[/tex] = 36 + 64

       100

QS = [tex]\sqrt{100}[/tex]

     = 10

QS = 10 cm

Since QS = TR, then;

WT = [tex]\frac{1}{2}[/tex] TR

      = [tex]\frac{1}{2}[/tex] x 10

WT = 5 cm

Thus, applying Pathagoras theorem to PWT;

[tex]PT^{2}[/tex] = [tex]PW^{2}[/tex] + [tex]WT^{2}[/tex]

      = [tex]12^{2}[/tex] + [tex]5^{2}[/tex]

      = 144 + 25

[tex]PT^{2}[/tex] = 169

PT = [tex]\sqrt{169}[/tex]

    = 13

PT = 13 cm

(b) To determine <PTR, TR = 10 cm. Apply the required trigonometric function;

Cos θ = [tex]\frac{adjacent}{hypotenuse}[/tex]

Cos θ = [tex]\frac{10}{13}[/tex]

          = 0.7692

θ = [tex]Cos^{-1}[/tex] 0.7692

  = 39.7179

θ = [tex]39.7^{o}[/tex]

Therefore, <PTR = [tex]39.7^{o}[/tex]

Find the value of x in the triangle shown below.
a. x=80
b. x=48
c. x= 32
d. x=12

Answers

Answer:

solution given:

by using Pythagoras law:

h²=p²+b²

x²=8²+4²

x=√80units

320÷÷((11−9)32(11−9)32) x 8 =

Answers

320÷((11−9)32(11−9)32) x 8

320÷((352-288)(352-288) x 8

320÷(64 x 64) x 8

320÷4096 x 8

0.078125 x 8

0.625

Answer:0.625

What is the approximate circumference of a circle that has a center at (6,2) and passes through the point (20,2)? (Use 3.14 as an approximation for pi)

answers : 126,88,63,44

Answers

Answer:

C = 88

Step-by-step explanation:

So, we know that the circle passes thru the point (20,2), and it's center is (6,2).

The general definition of a circle's radius is the distance from the center to any point on the circle!

Vertically, these points are the same - so if we just subtract 20 from 6 we know the distance between the center and this point on the circle!

[tex]20 - 6 = 14\\r=14[/tex]

Anyhow, we now know that the radius is 14. and the equation for a circle's circumference is as follows:

[tex]r2\pi \\or\\d\pi[/tex]

Insert the values into the equation....

[tex]C = 3.14(14)(2)\\C=87.92[/tex]

87.92 ≈ 88.00

Have a nice day, fam. Spread The Love <3

Triangle UVW has a perimeter of 11.5 units. Solve for y.

Answers

Answer:

The answer for y is 4 units

Step-by-step explanation:

The obvious question to ask in this situation is, “how many miles does Joseph travel on Mondays”? To compute, we each distance: 3 + 6 + 6 = 15.

Joseph travels 15 miles on Mondays.

Another way to work with this situation is to draw a shape that represents Joseph’s travel route and is labeled with the distance from one spot to another.

Notice that the shape made by Joseph’s route is that of a closed geometric figure with three sides (a triangle) (see figure 2). What we can ask about this shape is, “what is the perimeter of the triangle”?

Perimeter means “distance around a closed figure or shape” and to compute we add each length: 3 + 6 + 6 = 15

Our conclusion is the same as above: Joseph travels 15 miles on Mondays.

However, what we did was model the situation with a geometric shape and then apply a specific geometric concept (perimeter) to computer how far Joseph traveled.

Answer:

4 units

Step-by-step explanation:

Y-Coordinate
What is the Y-coordinate for each point below? The
y-coordinates are your code. (Use decimals where applicable.)
D
A
B
-2
]]]]
A
D
2 3
4
The numbers together form your code

Answers

Answer:

A = -2

B = 2

C = 2

D = 3

Step-by-step explanation:

those are the y- coordinates

como usar a camera frontal do nokia?

Answers

Answer:

Toque para cambiar a la cámara frontal.

Step-by-step explanation:

Answer: Uhhh if do you want to ask a question go to the bottom right corner and click the + and then you can use the camera.

PLZ HELP I WILL MARK BRAINLIEST

Answers

Answer:

Image wont load can you explain the problem to me through comments pls?

Step-by-step explanation:

The only thing im sure of is that for the chart the first one is 2 and the second one is four but not sure about the equation
Hope it helps :)

Can anyone help me out here?

Answers

Answer:

J. 19.7

Step-by-step explanation:

SOH(sine = opposite side/hypotenuse) CAH TOA

sin 80° = RS/20

=> 0.985 = RS/20

=> RS = 20 × 0.985 = 19.7

SOLVE

270.6 is 16 1/2% OF WHAT NUMBER?

WILL GIVE BRAINLIST




X
X
X
X
X
X
X

Answers

Answer:

approximately

1623.6

Step-by-step explanation:

16 1/2%=.165 which is approximately equal to 1/6, so we can just multiply the original number by 6.

please help me In exponents we have to write​

Answers

Answer:

1.  -3/13

2. (simplified) 8 / (exponential form) 2^3

3. 1265625/16384

4. 5

Step-by-step explanation:

no need for explanation just try the app Photo math (no space in the photo and math)

An investor wants to invest up to $100,000 as follows:

X amount into a Certificate of Deposit (CD) that yields an expected annual return of 1% with a risk index of 1,
Y amount into a Bond with an expected annual return of 3% and a risk index of 4,
Z amount into a Stock with an expected annual return of 7% and a risk index of 8.
The investor’s objective is to maximize the total expected annual return of the investment.

However, to be prudent, the investor requires that:
The fraction of the total investment in X must be at least 20%.
The fraction of the total investment in Z must not exceed 50%.
The combined portfolio risk index must not exceed 5.

Required:
a. Set up this investment problem as a linear program, which has 3 variables, 3 basic constraints, and 4 special constraints.
b. Use an LP software to find the maximum expected annual return in dollars and the dollar values of X, Y, and Z for this best investment.
c. From the software solution, show the values of the dual variables for the four special constraints.

Answers

Answer:

a-The Linear Model is as follows:

[tex]X+Y+Z\leq 100,000\\{0.001X}\geq 20\\{0.001Z}\leq 50\\0.00001X+0.00004Y+0.00008Z\leq5\\X\geq0\\Y\geq0\\Z\geq0[/tex]

b-The values are

X=$33,333.33

Y=$16,666.67

Z=$50,000.00

Leading to a total expected return of $4333.33.

c-The values of constraints are as follows

X+Y+Z=33333.33+16666.67+50000=100,000

X=33%, Y is 16.67% and Z is 50%

Risk component of X is 0.33

Risk component of Y is 0.66

Risk component of Z is 4.00

Step-by-step explanation:

a

From the conditions, the first special constraint is the total amount which is that the sum of investments must not be  more than the total available amount of $100,000 so

[tex]X+Y+Z\leq 100,000[/tex]

The second special constraint is that the percentage of X must be at least 20% So

[tex]\dfrac{X}{100,000}\times100 \geq20\\\dfrac{X}{1000} \geq20\\{0.001X}\geq 20[/tex]

The third special constraint is that the fraction of total investment of Z must not exceed 50% So

[tex]\dfrac{Z}{100,000}\times100 \leq50\\\dfrac{Z}{1000}\leq 50\\0.001Z\leq50[/tex]

The fourth special constraint is that the combined portfolio risk index must not exceed 5 so

[tex]\dfrac{X}{100,000}\times1+\dfrac{Y}{100,000}\times4+\dfrac{Z}{100,000}\times8\leq5\\0.00001X+0.00004X+0.00008Z\leq5[/tex]

As the investments cannot be negative so three basic constraints are

[tex]X\geq0\\Y\geq0\\Z\geq0[/tex]

The maximization function is given as

[tex]f(X,Y,Z)=\dfrac{X}{X+Y+Z}\times1\%+\dfrac{Y}{X+Y+Z}\times3\%+\dfrac{Z}{X+Y+Z}\times7\%\\f(X,Y,Z)=\dfrac{X}{X+Y+Z}\times0.01+\dfrac{Y}{X+Y+Z}\times0.03+\dfrac{Z}{X+Y+Z}\times0.07[/tex]

b

By using an LP solver with BigM method the solution is as follows:

X=$33,333.33

Y=$16,666.67

Z=$50,000.00

Leading to a total expected return of $4333.33.

c

The values of constraints are as follows

X+Y+Z=33333.33+16666.67+50000=100,000

X=33%, Y is 16.67% and Z is 50%

Risk component of X is 0.33

Risk component of Y is 0.66

Risk component of Z is 4.00

The queen of hearts, queen of diamonds, queen of spades, and queen of clubs are taken out of a deck of cards. They are to be put in 3 places on a table. In how many different ways can they be placed in the 3 spots?

Answers

Answer:

Hello There!!

Step-by-step explanation:

The answer is 52.

hope this helps,have a great day!!

~Pinky~

round to nearest 1000 place
5932
26148
527061​

Answers

Answer:

5932-6000

26148-26000

527061-527000

13.) In 1990, a radio costs $25. Now,
the radio costs $5. What is the
percent of change?

Answers

Answer:

Step-by-step explanation:

             80% of 25 = 5

because 10% of 25 = 2.5

and then       10 x 8 = 80

so                2.5 x 8 = 20

                  25 - 20 = 5

therefore, the percentage change is 80%

GIVE BRAINLIEST

hope this helped,

-cheesetoasty

Find the volume of the figure to the nearest tenth.

Answers

Answer:

150.8

Step-by-step explanation:

[tex]v = \frac{4}{3} \pi \:{r}^{2} \\ v = \frac{4}{3} \pi \:{6}^{2} \\ v = 150.8[/tex]

Hopefully this'll help you out!

Maria had $3,500 and invested it into an account with an annual
interest rate of 1.2%. If her investment were compounded monthly,
write an eqaution to find the value of her investment after t years.

Answers

Answer:

FV= $3,716.32

Step-by-step explanation:

Giving the following information:

Initial investment (PV)= $3,500

Interest rate (i)= 1.2% compounded monthly

First, we need to determine the monthly nominal interest rate:

Monthly interest rate= 0.012/12= 0.001

Now, to calculate the future value after 't' months, we need to use the following formula:

FV= PV*(1 + i)^t

For example, for 60 months:

FV= 3,500*(1.001^60)

FV= $3,716.32

If m\angle A=(6x+10)^{\circ}∠A=(6x+10) ∘ and m\angle B=(4x+30)^{\circ}∠B=(4x+30) ∘ , then find the measure of \angle B∠B.​

Answers

A=6 × + 10=88555%__/455

The vertices of a quadrilateral are M(-1,1), N(1,-2),O(5,0), and P(3,3).
Which statement describes quadrilateral MNOP?
Quadrilateral MNOP is a rhombus, but not a square.
Quadrilateral MNOP is a rectangle.
Quadrilateral MNOP is a trapezoid.
Quadrilateral MNOP is a parallelogram, but not a rectangle

Answers

Answer:

Quadrilateral MNOP is a rectangle.

Step-by-step explanation:

Quadrilateral MNOP is a parallelogram, but not a rectangle.

What is a rhombus?

A rhombus is a quadrilateral with all equal sides but angles not right angles. Diagonals of a rhombus intersect at 90°.

M(-1,1), N(1,-2),O(5,0), and P(3,3)

MN=√13

NO=√20

OP=√13

PM=√20

This means opposite sides are equal.

Slope of MN = -2/3

Slope of NO=2

The Slope of MN * The Slope of NO =-4/3 ≠ -1

This means the angle between adjacent sides is not equal to 90°

This means MNOP is not a rectangle

The Slope of MO = -6

The Slope of NP = 2/5

The Slope of MO * The Slope of NP =-12/5 ≠ -1

This means diagonals do not intersect at right angles.

This means MNOP is not a rhombus.

Slope of MN = -2/3

Slope of OP = -2/3

Slope of MN =Slope of OP

Similarly, Slope of MP =Slope of NO

So, quadrilateral MNOP is a parallelogram, but not a rectangle.

Thus, quadrilateral MNOP is a parallelogram, but not a rectangle.

To get more about rhombus visit:

https://brainly.com/question/20627264

Other Questions
How did the Federal Reserve attempt to avert the complete collapse of the financial system during the financial crisis of 2008?!!ANSWER TODAY WITHOUT LINKS OR BLANK ANSWERS!!last questions: https://brainly.com/question/23162950 https://brainly.com/question/23163038A) It ordered commercial banks to stop making loans.B) It encouraged the development of a credit crunch.C) It closed all commercial banks for four days.D) It loaned trillions of dollars to financial institutions. ASAPPPP18. The steps used to solve the equation 2x + 8 = 20 for x are shown below.2x + 8 = 20Step I: 2x = 12Step II: x = 6Which property makes Step I true?A. Division property of equalityB. Reflexive property of equalityC. Subtraction property of equalityD. Symmetric property of equality If f(x)=2x^2+x-3, which equation can be used to determine the zeros of the function?A) 0=(2x-3)(x+1)B) 0=(2x+3)(x-1)C) 0=2x(x+1)-3D) 0=2x(x-1)-3(x+1) find the total surface area of the following square pyramid Clownfish, sea anemone, coral, sea urchins, sponges, and parrot fish are just a few examples of the large variety of organisms that can be found in a coral reef. The coral reef and its inhabitants are suffering due to several factors such as pollution, coastal development, sedimentation and destructive fishing practices. What would be the most likely result if some of the species in the coral reef are destroyed? Other organisms would move into the coral reef area The coral reef would be allowed to flourish without so many fish and plants living in and around it. The coral reef would begin to deteriorate without the variety of fish and plants necessary to maintain balance. The waters surrounding the coral reef will become cool with the decreasing number of organisms living there CLEAR ALL PREVIOUS ... 6 7 8 9 10 11 12 13 14 15 ... ABCD m angle ACD=2x+4 and m angle ACB=5x-5 . For what value of ABCD rhombus?Please help quick ! This is a timed test Which statement about the Black Death that struck Europe in the fourteenth century is correct?Feudal lords gained greater control over the serfs who depended on them.The effects of the plague on Europe encouraged scholars to study medicine and natural science.The plague left Great Britain more powerful than any other country because the plague did not spread to there.Most Europeans turned away from religion when their prayers did no good in stopping the disease. Can someone please help me Whats the answer please which of the following circles would have the same arc length of AB? What is the solution to the equation below? Round your answer to twodecimal places.ex = 0.6O A. x= -0.51B. x = 1.82C. X = -0.22D. x= 3.98SUBMIT TRANSLATE the mRNA into amino acids: AUG CAC UGU CCU UUC GCU GAC CCC UAA Elaine needs $1,500 to buy textbooks and other school supplies. Kramer agrees to loan Elaine $1,500, accepting as collateral Elaines car. They put their agreement in writing and sign it. Elaine keeps possession of the car. What are the requirements for Kramer to have an enforceable security interest in the car? What must Kramer do to let other creditors know of his security interest in the car? Gold atoms find their "birth" inside of huge _________. Raj rides his bike for 3.4 miles. What is the length of Raj's bike ride in feet? Enter your answer in the box. Between a river and its floodplain, you will find elevated linear mounds of sand, silt, and fine gravel that formed along the banks of the river during successive floods. These are called ________________.natural leveescut banksdeltasdistributaries If you know javascript...plz help meHaving trouble using "\" to ecapefirst pic is instructions...second is what i have... what happen when hydrogen peroxide is decomposed so by balance chemical equation I was asked to continue from the ending of Where are you Going, Where have you Been? And create my own ending using the same word choices and tone used in the story. Can someone give an idea of a good ending for this story? Sheila always has her cell phone in her hand. She thinks it is important to respond to people immediately because that makes them feel important. Sheila never wants to miss anything that might be happening online, either. When it is time to go for her job interview, what should Sheila do with her phone?A. Continue into the room with her phone so that the interviewer knows she will always answer his calls.B. Put her phone on silent but continue to receive and send texts throughout the interview.C. Put her phone on silent but only answer a call if it is an emergency.D. Completely put away her cell phone during her interview.