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

This recipe makes 6 portions of chocolate mousse.
Cali has 600 g chocolate, 36 eggs, 100 mL of lemon juice and 200 g of sugar.
Cali makes 12 portions of mousse by following this recipe.
How much of each ingredient will she have left?

Recipe: Serves 6
180 g chocolate
9 eggs
15 mL lemon juice
60 g sugar

Answers

Answer:

240 g chocolate

18 eggs

70 mL lemon juice

80 g sugar

Step-by-step explanation:

600 g choc - (2 x 180) = 240 g left

36 eggs - (2 x 9) = 18 left

100 mL lemon - (2 x 15) = 70 mL left

200 g sugar - (2 x 60) = 80 g left

Answer:

Ingredients will have left

Chocolate

600 - 2*180 = 240 g

Eggs

36 - 2*9 = 18

Lemon juice

100 - 2*15 = 70 ml

Sugar

200 - 2*60 = 80 g

Please help me but no links

Answers

Answer:

I think you got to time it all togther and the answer would be 531.44m^3

Step-by-step explanation:

(5.2×7×14.6)mmm

(36.4×14.6)mmm

531.44m^3

The probability that it will snow on Sunday is 3/5. The probability that it will snow on both Sunday and Monday is 3/10. What is the probability that it will snow on Monday, if it snowed on Sunday?

Answers

Answer:

1/2

Step-by-step explanation:

Probability of snowing on both Sunday and Monday= probability that it will snow on Sunday × probability that it will snow on Monday.

(and usually means multiply the probabilities while or implies addition of the probabilities).

Let probability of snowing on Monday be P

Hence 3/10=3/5× P

Hence P=(3/10) divided by (3/5) = 1/2

What are some of the applications for exponential functions?
Designing identification tags
Conversion of measurements
Assigning phone numbers
Finding perimeter
Determining the number of subsets in a given set

Answers

Answer:

Option B and D are correct

Step-by-step explanation:

Exponential functions are really useful in the real world situation. They can be used to solve following

a) Population Models

b) Determination of area and perimeters

c) Determine time related things such as half life, time of happening of an event etc.

d) Useful for solving financial problems such as computing investments etc.

Hence, option B and D

Which equation gives the sum of...
S=0.2/1-8
S=1/8-0.2
S=8/0.2-1
S=8/1-0.2

Answers

Answer:

Option D

S=8/1-.2

Step-by-step explanation:

Edg

The sum of the sequence will be S = 8 / (1 – 0.2). Then the correct option is D.

What is the sum of the geometric series?

Let a be the first term and r be the common ratio. Then the sum of the geometric series will be

S = a / (1 – r) if r < 1

S = a / (r – 1) if r > 1

The sum of [tex]\rm \Sigma_{n = 1}^{\infty} 8(0.2)^{n - 1}[/tex].

Then the first term of the geometric sequence will be 8.

And the common difference between the successive terms will be 0.2.

The common ratio less than one, then the formula for the sum will be given as

S = a / (1 – r) if r < 1

Then the sum of the sequence till infinity will be

S = 8 / (1 – 0.2)

S = 8 / 0.8

S = 10

Thus, the sum of the sequence will be S = 8 / (1 – 0.2).

Then the correct option is D.

More about the sum of the geometric series link is given below.

https://brainly.com/question/2771750

#SPJ5

does anyone do primavera online 8B i need help ASAP
lots of point

Answers

no I don't I'm sorry.....

David’s watch broke. He decides to get it fixed instead of replacing it. The total cost to repair the watch can be represented by 0.07(45h) + 45h, where h represents the number of hours it takes to repair the watch. What part of the expression represents the amount of tax David has to pay? Explain.

Answers

0.07

45h represents how much it costs per hour to get it fixed and how long it takes to get it fixed
0.07(45h) would represent the tax because it is 7% of the cost pretax

What’s the answer to this question?

Answers

Answer:

the second one from up to down

Step-by-step explanation:

The 2nd one!:) Hopefully that helps you or hopefully is correct

Which one is the missing number?

Answers

Answer:

Step-by-step explanation:

1 or 4 im not sure

It is +0. Look at the first term. 1x28 is 28, and you already know it has to be times 28z

Someone help need this to pass last question for today!

Answers

Answer: Reflection=simply flipping an object across a line without changing its size or shape. While Translation just slide a figure in any direction without changing its size, shape or orientation.

Hopes that helps have a blessing day/night :)

Which expression means the same as "the quotient of 8 less than x and 4"?
A. (x + 4) - 8
B. (x + 4) = 8
a
C. (8 - x) = 4
D. (x-8) + 4
o
E (x - 8) -4

Answers

I think the answer is E

Answer: E

Step-by-step explanation:

A window is 12 feet above the ground. A ladder is placed on the ground to reach the window. If the bottom of the ladder is placed 5 feet away from the building, what is the length of the ladder?

Answers

Answers :

you will nees to use pythagorean theorem a^2 + b^2 = c^2

the a and b values will be 12 and 5 feet. So just plug them in and solve for c

12^2 + 5^2 = c^2

144 + 25 = c^2

169 = c^2 square root both sides

13 = c

so the ladder has a length of 13 feet.

help me please! i’m giving brainliest. :)

Answers

Answer:

1,814,000 mg

Step-by-step explanation:

1 kg = 1,000 g

1 g = 1000 mg

1 kg + 814 g = 1,814 g

1,814(1000) = 1,814,000 mg

Expand and simplify 3(y+2)+4(x-1)

Answers

Answer:

4x + 3y + 2

Step-by-step explanation:

3(y + 2) + 4(x - 1)

3y + 6 + 4x - 4

4x + 3y + 2

A snake at the zoo is 4 feet long. A scale model of the snake is 2 inches long. What is the scale factor?

Answers

1/24 4 feet = 48 inches. 48 divided by 2 = 24. Therefore 48 divided by 1/24 = 2

which can be used to find the perimeter of the rectangle?

Answers

Answer:

Step-by-step explanation:

2 ( 5 plus 13)

Brainlist?

Find the slope that passes through the points (1,4) and (-4,14)

A: 1
B: -2
C: 1/2
D: -1

Answers

Answer:

B:  -2

Step-by-step explanation:

14-4/-4-1 = 10/-5 or -2

Answer:

-2...................

What is x plsssss help

Answers

Answer:

x = 6 (brainliest..?)

Step-by-step explanation:

x² = 4(4 + 5)

x² = 36

x = 6

62 x 37. How do I show my work help.

Answers

Step-by-step explanation:

62

x37

-------

434

+1860

--------

2294

Refer to the table below to answer problems 25-27.

(TABLE) Mark's Personal Running Records Distance Time (minutes:seconds)
1/4 mile: 0:58
1/2 mile: 2:12
1 mile: 5:00

If Mark set his 1-mile record by keeping a steady pace, then what was his 1/2 -mile time during the 1-mile run? ​

Answers

Answer:

it will be 2:50

Step-by-step explanation:

Measuring your fitness level regularly is one way to find out if you're making progress. Most fitness centers have trained staff who can evaluate your body composition, muscular strength and endurance, flexibility, and cardiovascular endurance, but it can be pricey. If you don’t have access to all the toys and tools of your gym, don’t panic. You have everything you need to measure your fitness level in your own house!

This One-Mile Walking Test measures your aerobic (cardiovascular) fitness level based on how quickly you are able to walk a mile at a submaximal (moderate) exercise intensity.

Sunny Horizon Cellular’s phone plan has a monthly fee of $10.00 and charges $0.10 for every minute used. Stephan’s bill for the month was $23.80. If the equation that models this situation is (0.10)m + 10.00 = 23.80, use inverse operations and properties of equality to find the number of minutes Stephan talked during the month.

Answers

(0.10)m +10.00 = 23.80
0.10m = 13.80
m=13.80/0.10
m = 138 minutes

Answer:

She talked for 138 minutes

Step-by-step explanation:

A store pay $120 for a bicycle. The store has a 60% markup policy. What is the selling price of the bicycle? (answer $192)
Use your answer from the above question to help answer this question!! The store is now going out of business and is selling all of the bicycles at a 30% discount. What is the sale price of the bicycle? (answer $134.4)

Use the information from the last two questions to help you answer this question. Will the store make money or lose money on the bicycle? How much?

Answers

Answer:

The store will make money for each option/event. For the first option, the store will earn extra $72. For the second option, the store will earn extra $14.4.

Step-by-step explanation:

120 x 1.6 = 192

192 x 0.7 = 134.4

For problem 1, the answer is $192

For problem 2, the answer is $134.4

The store will make money for each option/event.

192-120=72

134.4-120=14.4

In the year 2009, a company made $5.4 million in profit. For each consecutive year after that, their profit increased by 11%. How much would the company's profit be in the year 2012, to the nearest tenth of a million dollars?​

Answers

Answer:

Hi Grif05!

Your answer is 7.1 million.

To be exact , 7182000

Step-by-step explanation:

The distance between 2009 and 2012 is 3 years so we multiply.

11x3=33.

Now we must find 33% of 5.4 million.

33 % of 5.4 million is 1782000.

33% of 5400000 = 1782000

We then add 33% of 5.4 million to itself.

We get an answer of 7182000.

Hope this helps! Tell me if I'm wrong please :)

Can someone help me

Answers

Answer:

B: (-6, -1)

Step-by-step explanation:

6+x/2 = 0

6+x = 0

x = -6

-5+y/2 = -3

-5 + y = -6

y = -1

Answer:

(-6,-1)

Step-by-step explanation:

We can use the midpoint formula here to find the coordinates of B . Given data :-

A(6,-5) M(0,-3)

Let B be B(p , q) . Then ,

=> M = ( x₁ + x₂/2 , y₁ + y ₂ /2 )

=> (0 ,-3) = ( 6 + p/2 , -5+q/2)

On comparing

=> 0 = 6 + p/2

=> 6 + p = 0

=> p = (-6)

Similarly

=> -3 = -5+q/2

=> -5+q = -6

=> q = 5-6

=> q = (-1)

Hence the coordinates of B is (-6,-1) .

4x^2+ xy+81y^2 find the missing number

Answers

^ what that person said

Answer: (9y^4*x^6)^2

Step-by-step explanation: First you take the square root of 81, which is 9. Next, you divide 8 and 12 by 2. Lastly, you multiply everything together, and you get a final answer of (9y^4*x^6)^2. Do you do RSM?

2 x - 3 / 5 = - 1 / 10

Answers

Answer:

1/4

Step-by-step explanation:

2x=-1/10 + 3/5

2x=1/2

x=1/4

What is the volume of the rectangular prism?

Answers

Answer:

63

Step-by-step explanation:

The answer is ........ 63

You have $5. You pay someone $3. You receive a gift of $4.

Answers

You have $6 in the end.

5 - 3 + 4 = 6

PLSS HELP ASAP!!
13 points when answered:) Thank you!!

Answers

Answer:

The wright answer is A

Step-by-step explanation:

[tex] \sqrt{20} = 4.47 \\ \frac{14}{3} = 4.67 \\ 4.47 < 4.5 < 4.67[/tex]

PLZZZZ HELP MIDDLE SCHOOL MATHHH I PROMISE I WILL GIVE BRAINLIEST!!!​

Answers

Answer:

It's C

Step-by-step explanation:

Because it says to look for the number 5 on the chart and chart C is the only one that has is on there. Hope this helped!

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