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

Morgan is a teacher and takes home 87 papers to grade over the weekend. She can grade at a rate of 9 papers per hour. How many papers would Morgan have remaining to grade after working for 7 hours?

Answers

Answer: 24

Step-by-step explanation: Delta math  a=78+(7−1)(−9)

Answer:

2369.9

Step-by-step explanation:

Add it back

plz help i give 50 points

Answers

Answer:

area of trapezium = 20 in^2

Step-by-step explanation:

here's your solution

==> area of trapezium = 1/2*(sum of parrel side)*distance between them

==> length of parrel sides = 6 in and 2 in

==> height = 5 in.

==> area of trapezium = 1/2(6 + 2) * 5

==> area of trapezium = 20 in^2

hope it helps

Step-by-step explanation:

sorry for this

"i try so can you rate"

Recall that the angles of every triangle sum to 180°. The three angles of a triangle ABC are even consecutive integers. Find the measures of all three angles of the triangle, listing them from the smallest to the largest angle. A is the smallest angle: degrees B is the next angle: degrees C is the largest angle: degrees​

Answers

Answer:

A = 58

B = 60

C = 62

Step-by-step explanation:

A + B + C = 180

A = 58

B = 60

C = 62

58 + 60 + 62 = 180

what is the ans and pls explain

Answers

The answer is a happy to help

Julie printed out a picture of each of the five members of her favorite band to decorate her bedroom door. Each picture measures 8
inches by 10 inches. Once decorated, how many square inches of Julie's door will be covered by these pictures?
OA.
400 square inches
OB. 320 square inches
OC. 480 square inches
OD
180 square inches

Answers

Answer: A.) 400 square inches
Explanation:
Well, if the 5 pictures are squares/rectangles, then we should use the formula “base x height” to find the area..

10 x 8 is 80

Since therr are 5 pics, we do this:
80 x 5 = 400

So uhhh there ya go, 400 square inches..

(Pls, if someone thinks im wrong, correct me)
If im right, mark me brainliest plss

Find the slope of the line that passes through (10,8) and (1,9).

Answers

Answer:

[tex]-\frac{1}{9}[/tex]

Step-by-step explanation:

between (1, 9) and (10, 8), the x moves by 9 and y moves by -1

The slope is equal to: [tex]\frac{\Delta y}{\Delta x} = \frac{-1}{9} = -\frac{1}{9}[/tex]

Answer:

-1/9

Step-by-step explanation:

plug in the slope formula:

y-y

-----

x-x

=9-8

-------

1-10

=-1/9

−10 = −0.4k

this is probably easy but can someone find k

Answers

Answer: k = 25

hope this helped :)

Which sequence of transformations will change figure PQRS to figure P′Q′R′S′? (5 points)



Group of answer choices

Counterclockwise rotation about the origin by 180 degrees followed by reflection over the x-axis

Counterclockwise rotation about the origin by 180 degrees followed by reflection over the y-axis

Counterclockwise rotation about the origin by 270 degrees followed by reflection over the x-axis

Counterclockwise rotation about the origin by 270 degrees followed by reflection over the y-axis

Answers

Answer:

Step-by-step explanation:

Counterclockwise rotation about the origin by 180 degrees followed by reflection over the y-axis

Which number line shows the graph of x 11?
OA
+
9
10 11 12 13 14
10 11 12 13 14
+
9 10 11 12 13 14
6 7 8 9
10 11 12 13 14

Answers

Answer:

B

Step-by-step explanation:

X 11 means that x could equal 11. The number is included on the answer. So, the circle on the number line has to be closed/filled in. X could be any number equal to or greater than 11, so the number line has to be shaded to the right. :D

Kurt recorded the amount of rainfall in each month for one year. What was the total rainfall that​ year?

Answers

Answer:wheres the question

sadStep-by-step explanation:

sadsadsa

Examine the figure of two parallel lines cut by a transversal.



What is the value of x?

Answers

Answer:

x=17

Step-by-step explanation:

The angles present are Alternative interior angles. That means that they are congruent. Meaning 4x+7 = 75. To solve for 7, you subtract 7 from both sides. That leaves you with 4x=68. Then you divide both sides with 4. Then you get x=17.

Hope this helps!

BTS!!

Answer:

x = 17

Step-by-step explanation:

75° and (4x + 7)° are alternate interior angles.

If two lines are cut by a transversal, then the alternate interior angles are congruent.

75 = 4x + 7

=> 4x = 68

=> x = 17

Plz help this is due today AND NO LINKS OR GROSS PICTURES OR I REPORT.

Answers

Answer: D, an equilateral triangle has three congruent sides.

Answer: D

Step-by-step explanation: An equalterial triangle has 3 congruent sides!

I hope this helps! May God bless you! :)

Identify the area of the figure shown.

Answers

Answer:

54

Step-by-step explanation:

Find the area of the triangle:

1/2((3 + 5 + 3)*8) = A

1/2((11)*8) = A

1/2(88) = A

44 = A

Find the area of the rectangle:

2 * 5 = A

10 = A

Add the two areas:

10 + 44 = A

A = 54

Help me and I’ll give you brainliest

Answers

Answer:

Q = 12 meters

Step-by-step explanation:

Since all angles of the triangles are the same, the two triangles are similar. Therefore, all you need to do is a simple comparison equation like 10/15=8/x and solve.

Cross multiply, 10x=120. Divide and get x = 12.

Hope this helps!

5x-6=29. What does x equal

Answers

Answer:

Solution given:

5x-6=29.

5x=29+6

x=35/5=7

x=7 is your answer

Answer:

x=7

Step-by-step explanation:

What is the following simplified product? Assume x>0.
218x3 3.V10x4 – x15x?
0 244² √5% - 44² √10x
24x35x - 4x3 10X
24x3 75-4x310x
O 24x35x +4x® /10x

Answers

Answer:

[tex]24x ^{3} \sqrt{5 - 4x ^{3} } \sqrt{10x} [/tex]

Gavmans
add me on pinterest

Answers

Answer:

I would also add you...but i just don't WANT to

The distance around one block in Ava's neighborhood is 3/4 mile. If Ava rides her bike around the block 5 times, how many miles does she ride

Answers

Answer:

Use the number line to help. 1. See answer. Add answer+13 pts ... 1 answer. 11 people helped. Answer: I think the answer is 3 3/4. Step-by-step explanation: 5 ...

Step-by-step explanation:

One earthquake has MMS magnitude 3.2. If a second earthquake has 390 times as much energy (earth
movement) as the first, find the magnitude of the second quake.

Answers

Section 4.6 Exponential and Logarithmic Models
While we have explored some basic applications of exponential and logarithmic functions, in this section we explore some important applications in more depth.
Radioactive Decay
In an earlier section, we discussed radioactive decay – the idea that radioactive isotopes change over time. One of the common terms associated with radioactive decay is half- life.
Half Life
The half-life of a radioactive isotope is the time it takes for half the substance to decay.
Given the basic exponential growth/decay equation h(t) = abt , half-life can be found by solving for when half the original amount remains; by solving 1 a = a(b)t , or more
2
simply 1 = bt . Notice how the initial amount is irrelevant when solving for half-life. 2
Example 1
Bismuth-210 is an isotope that decays by about 13% each day. What is the half-life of Bismuth-210?
We were not given a starting quantity, so we could either make up a value or use an unknown constant to represent the starting amount. To show that starting quantity does not affect the result, let us denote the initial quantity by the constant a. Then the decay of Bismuth-210 can be described by the equation Q(d) = a(0.87)d .
To find the half-life, we want to determine when the remaining quantity is half the original: 1a. Solving,
2
1 a = a(0.87)d 2
1 = 0.87d 2
1 d log2=log(0.87 )
Divide by a,
Take the log of both sides Usetheexponentpropertyoflogs

A farmer wants to know the effect of using various amounts of fertilizer in relation to the yield of his crops. Be subdivided a portion of his land into 10 separate but essentially equal plots. He divided the land so that all of the plots had equal exposure to sun, rain, and other environmental conditions. He randomly selected 2 of the 10 plots and spread 2 pounds of fertilizer over each of them. Then he randomly selected 2 of the remaining plots and spread 3 pounds of fertilizer over each of them. He continued with the last sets of plots in the same manner, spreading 4, then 5, then 6 pounds of fertilizer over each of them. Below is a computer output for linear regression of amount of fertilizer versus yield for the 10 plots of land.

Predictor Coef SE Coef T P
Constant 10.100 0.7973 12.67 0.000
Fertiz 1.150 0.1879 6.12 0.000

Required:
What is the equation of the least squares regression line from this sample?

Answers

Answer:

The equation of line is

[tex]\text{yield}=1.15\times \text{fertilizer}+10.1[/tex]

Step-by-step explanation:

The general equation of line is given as

[tex]y=mx+b[/tex]

where

y is the dependent variable which is yield in this case.

x is the independent variable which is fertilizer in this case

m is the coefficient of the fertilizer whose value is 1.150 from the given values.

b is the constant whole value is 10.100 from the given values.

Thus the equation becomes.

[tex]\text{yield}=1.15\times \text{fertilizer}+10.1[/tex]

NO LINKS OR WILL BE REPORTED
The table below shows the numbers of tickets sold at a carnival and the amounts of money in dollars collected Cost of Carnival Tickets

Number of Tickets. Amount $ Collected.
5 $15
10. $30
15. $45
20. $60
25. $75
Which equation represents the relationship
A y = x + 10
B y = 5x
C y = x + 15
D y = 3x​

Answers

The answer is D. Call number of tickets is ‘x’ and amount $ collected is ‘y’. If x=5, y=3x5=15.

What is the solution to |2x-8|<2?

Answers

Answer:

A) 3<x<5

Step-by-step explanation:

Given: |2x-8|<2

Make two inequalities:

First inequality:

2x-8<2

2x<10

x<5

Second inequality:

2x-8>-2

2x>6

x>3

Therefore, your solution is 3<x<5 since the two inequalities pass each other, making an "and" inequality.

graph the function y=x3+3x2-1. based on the graph what is the least possible x-value if y=0? round your answer to the nearest hundredth, if necessary

o -2.88
o -2.00
o -0.65
o -0.53

Answers

Answer:

-2.88

Step-by-step explanation:

When graphed Y=0 crosses the X-axis three times

X= -2.88, -0.65, 0.53

Answer:

It's A on edge or -2.88

Step-by-step explanation:

Five different DVDs cost:

$11.50, $11.00, $17.00, $21.25, $16.00

median =
$16.00
$10.25
$15.35

Answers

Answer:

16

Step-by-step explanation:

mode = the most

mean = ave

median = the no. in between

so arrange those five costs the one in the middle is 16

Hopes this helps:

Answer: 16.00

Arrange you numbers in numerical order. Than your middle number will be you answer.

Can you figure out the answer?​

Answers

Answer:

1680

Step-by-step explanation:

480x3=1440

480/2=240

1440+240=1680

What is the length of segment AB? PLEASE HELP!!!

Answers

Answer:

4

Step-by-step explanation:

we have hypotenuse and opposite so we can use sin

sin(45) =O/4√2

rearrange

sin(45)x4√2 =O

=4

multiplying and simplify radicals!

if u get it right I’ll give brainliest (show work pls!!!)

Answers

Answer: 8

Explanation: To multiply two square roots together, simply multiply the numbers inside the square roots together to get [tex]\sqrt{64}[/tex] which is 8.

Notice that when you multiply a square root times itself, the radical disappears, and you're left with the number inside the original square root.

1) A bag contains six red marbles and eight blue marbles. You randomly pick a marble and then pick a second marble without returning the marbles to the bag. Both marbles are red. ​

Answers

Answer:

You would have 4 red marbles and 8 blue marbles since you didn't return the ones you took out to the bag.

Step-by-step explanation:

6 - 2 = 4

The 8 would stay the same

There for you would have 4 red marbles and 8 blue marbles left in the bag. Totalled you have 12 marbles in the bag and 2 out of the bag. (8 + 4 = 12)

Including the marbles in and out of the bag you have 14 marbles. The 12 inside the bag + the 2 outside of the bag = 14 marbles totalled.

Solve 3x^2 if x is 10



By the way, the x is a variable

Answers

300 is your answer.......

NO LINKS/FLIES PLEASE .

Morgan pays $25 in monthly fees for her baseball team's uniforms and field rental. What kind of expense is the fee she pays?

A. Variable

B. Income

C. Fixed

D. This would not be an expense.

Answers

I would say it is a fixed fee because it doesn’t change
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