4.8 Twitter users and news, Part I: A poll conducted in 2013 found that 55% of U.S. adult Twitter users get at least some news on Twitter (Pew, 2013). The standard error for this estimate was 2.6%, and a normal distribution may be used to model the sample proportion. Construct a 99% confidence interval for the fraction of U.S. adult Twitter users who get some news on Twitter, and interpret the confidence interval in context. (please round all percentages to 2 decimal places)

Answers

Answer 1

Answer: Required 99% confidence interval  : (48.30%, 61.7%)

Step-by-step explanation:

Confidence interval for PROPORTION:  [tex]p\pm z^* \times S.E.[/tex], where p = sample proportion , z* = two-tailed critical z-value  and S.E. = standard error.

As per given: p=55%

Critical z-value for 99% confidence = 2.576

S.E. = 2.6%

Then, required confidence interval :

[tex]55\% \pm (2.576)\times 2.6\%\\\\\approx55\% \pm6.70\%\\\\=(55\%-6.70\%,\ 55\%+6.70\%)\\\\=(48.30\%,\ 61.7\%)[/tex]

Required 99% confidence interval  : (48.30%, 61.7%)


Related Questions

Round 496,516 to the nearest thousand

Answers

Answer:

500,516

Step-by-step explanation:

j(2x+9) m(6x-1)
i don’t get this at all

Answers

Answer:

omg that one is hard but it is 18j-6m

PLEASE HELP!!
Which city did you pick and why? What is one common boating hazard in this city?

Answers

The examples of boating hazard include dams, sun stroke, and bad weakther.

How to illustrate the information?

It should be noted that a hazard simply means a source of potential damage that leads to a adverse effect on one's health.

In this case, the common boating hazards that can be witnessed include fast changing weather, sun stroke and current.

Learn more about hazard on:

brainly.com/question/7310653

#SPJ1

write the four equivalent fraction of 9/13​

Answers

Step-by-step explanation:

18/26

27/39

36/52

45/65

An equivalent fraction for a/b is found by multiplying the numerator and denominator by a common integer (n)

Brice has $30 to take his brother and his friends to the movies. If each ticket costs $4.00, and he must buy tickets for himself and his brother, what is the
greatest number of friends he can invite?

Answers

Answer:

5 friends

Step-by-step explanation:

beacuse it costs $8.00 for himself and his brother, and he can only invite 5 friends because $30 - $8 is $22

so $22 divided by 4 is 5

Answer:

5

Step-by-step explanation:

You start with $30, and each ticket cost $4.

You have to buy AT LEAST 2 tickets for Brice (yourself in the story) and Brice's brother. That 30-8=22.

22/4=5 (without going over 22)

what is the answer? pls help

Answers

Answer:

m = undefined

Step-by-step explanation:

m = 9 - 6 / 5 - 5

m = 3 / 0

m = undefined

Answer:

undefined

Step-by-step explanation:

Because x is constantly 5, it is a straight line going up and down. This type of graph has an undefined slope.

Nate walks 11 miles in 4 hours. At what unit rate does Nate walk?
A.
4 hours
11 miles
B.
4 miles
11 hours
C.
11/4 miles
1 hour
D.
11 miles
4 hours

Answers

Answer:

2 3/4 C

Step-by-step explanation:

multiply 4 two times and you will get 2 as your hole number and 3 as you numerator and 4 as your denomater

Determine the area under the standard normal curve that lies to the right of the z-score of 1.44. (Use a four-digit decimal. No rounding necessary.)

Answers

Answer:

The area is 0.0749

Step-by-step explanation:

The area under the standard normal curve represents probability and has a total value of 1

Now, to the right of the z-score 1.44, the area we are considering is the probability below;

P( z > 1.44)

To get this value, we need to use the standard normal distribution table

Checking this, the probability is

P( z > 1.44) = ) = 0.074934 which is 0.0749 for a four decimal digit

Chase drew a scale drawing of a community college. A building at the college, which is 260 meters long in real life, is 286 millimeters long in the drawing. what scale did chase use?

Answers

Given parameters:

Actual length = 260m

Drawing length = 286mm

Unknown:

Scale used = ?

Solution:

A scale compares drawing length to ground distance;

                    To find the scale,

Express the two quantities in the same unit;

       actual length  = 260 x 10⁻³m = 0.26mm

  Now;

           drawing length : actual length

                  286mm : 260 x 10⁻³mm

                  divide by 286;

                     1mm on drawing  : 9 x 10⁻⁴mm on map

   or;

                     1mm on drawing is 0.9m on ground

                   

Karen is trying to decide which home phone company to use. Phone Home was a monthly charge of
$45 and charges $0.01 per minute. CallMeMaybe has a monthly charge of $10 and charges $0.05 per
minute. Write an inequality to represent the number of minutes used in order for Phone Home to
have the better deal.

Answers

Answer:

Is this a joke?

Step-by-step explanation:

what is 1.25x1.19 pls hurry

Answers

1.4875 ..............

I have to do step by step why the answer of (5x - 1) (5x - 1) is 25x^2 - 10x + 1.
How do i do it?

(5x - 1) (5x - 1)

Ans: 25x^2 - 10x + 1

Answers

There’s 2 ways. One is simpler than the other; A normal bracket expansion we would do 5x * 5x which equals to 25x^2, then 5x * -1. Do the same with the second bracket: 5x * 5x = 25x^2. Then, 5x * -1 which is -5x
Now we have 25x^2 + -5x + 25x^2 -5x. Add like terms to get 50x^2 - 10x.
And the second method is using Pascals triangle but I’m not going to get much in detail as this is just a double extension bracket and all it will do is confuse you.

Answer:

Step-by-step explanation:

(5x - 1) (5x - 1)

= [tex](5x - 1)^{2}[/tex]

Using laws of exponents,

[tex](a - b)^{2} = a^{2} - 2ab + b^{2}[/tex]

here, a = 5x, b = 1

so it becomes,

[tex]5x^{2}[/tex] - 2 × 5x × 1 + [tex]1^{2}[/tex]

[tex]25x^{2}[/tex] - 10x + 1

Hope this helps

plz mark as brainliest!!!!!!!!

Answer these questions for me please

Answers

The first one is 29 minutes, the second one is no, and I was too lazy to do the third
First one is 29
Second one is no
And the cat went to sleep at 11:14

hellllllllllllllllllllllllllllllllllpppppppppppppppppppppppp whats the x

Answers

Easy buddy....

[tex]2 x + 68 = 180[/tex]

Subtract the sides of the equation minus 68

[tex]2x = 180 - 68[/tex]

[tex]2x = 112[/tex]

Divided the sides of the equation by 2

[tex]x = \frac{112}{2} = 56 \\ [/tex]

So ;

[tex]x = 56 \: degreees[/tex]

_________________________________

And we're done.

Thanks for watching buddy good luck.

♥️♥️♥️♥️♥️

What is the function equation of this table?

Answers

Answer:

-2/-9

Step-by-step explanation:

The -2 would be the junction and so on the graph it would say -9 to the x

what is polar form in maths term ??​

Answers

Answer:

The polar form of a complex number is another way to represent a complex number. The form z=a+bi is called the rectangular coordinate form of a complex number. The horizontal axis is the real axis and the vertical axis is the imaginary axis.

Plot the image of point A under a dilation about point P with a scale factor of 3.

Answers

Answer:

THere is no image do da

Step-by-step explanation:

Please Help thank you very much!!​

Answers

Answer: A

Step-by-step explanation:

Sams is greater than Wendy’s

Answer:

A

Step-by-step explanation:

Sam's balance: $161

Wendy's balance: $152

Of these two numbers, which is the greater one? 161. So, option A would be correct.

What is the answer and how do I work this.

Answers

Answer:

other

Step-by-step explanation:

you should now this it's too esay in which standard are you. tell in comments

I’ll give Brainly! Jim has ten more dollars than Gail. Together they have at most twenty-seven dollars.

A. Determine the possible amounts of money Gail could have.
B. Sketch the solution on a number line.

Answers

Answer:

see below

Step-by-step explanation:

Let g= amount that gail has

j = g+10

j+g ≤ 27

Substitute  the first equation into the inequality

g+g+10 ≤ 27

2g + 10 ≤ 27

Subtract 10 from each side

2g≤ 17

Divide by 2

g≤ 8.5

Answer:

Let g= amount that gail has

j = g+10

j+g ≤ 27

Substitute  the first equation into the inequality

g+g+10 ≤ 27

2g + 10 ≤ 27

Subtract 10 from each side

2g≤ 17

Divide by 2

g≤ 8.5

Step-by-step explanation:

3. - 15 x + 30 2 -3
Write the equation in slope-intercept form

Answers

Answer:

Rewrite the numbers. this isn't an equation

What does m equal ? Please help I need this turned in by tomorrow.

Answers

Answer:

gnilr

Step-by-step explanation:

Answer:

M equals 1.......... .

Write an equation for each line in slope-intercept form.

Answers

Answer:

y = x + 7

Step-by-step explanation:

The slope-intercept form of a line is:

y = mx + b

where m is the slope and b is the y-intercept.

Looking at the graph, we can see that the line intersects the y-axis at y = 7. So 7 would be our y-intercept.

To find the slope, we would divide the rise of the line by the run. Or m = rise/run. From looking at the graph, we can see that for every 1 unit the line moves in the x-direction, the line moves in the y-direction by 1 unit. Therefore, the rise would be 1 and the run would be 1. 1/1 = 1 so the slope of the line would be 1.

Plugging in 7 for b and 1 for m into the equation for the slope-intercept form, we get:

y = x + 7

So that would be the equation for the line in slope-intercept form.

I hope you find my answer and explanation to be helpful. Happy studying.


Your mom needs 2 potatoes, 1 pounds of asparagus, and 2 pounds of fish. How
much did your mom spend on her grocery shipping, not including tax? Answer in hundredth

I need help ASAP it’s due in 4 hours! Thank you!

Answers

Answer:

$13.42

Step-by-step explanation:

Two potatoes cost $2.50

$3.75 ÷ 3 = $1.25     $1.25 x 2 = $2.50

1 lb of asparagus is $2.48

$4.95 ÷ 2 = $2.48

2 lbs of fish cost $8.44

$12.65 ÷ 3 = $4.22   $4.22 x 2 = $8.44

$2.5 + $2.48 + $8.44 = $13.42

What does “each point of a line maps to itself” mean? I don’t understand it what it means for it to map to itself.

Answers

Answer:

Step-by-step explanation:

For example if you have a function f(x) = x - 1, then x = 1 is a zero of this function because using it as x gives 1 - 1 = 0. The Riemann Zeta function has some zeros that are easy to find which are of little interest but there are some other ones that are harder to find which is why the are called non-trivial.

Write the following repeating decimal using a bar over the repeated digit(s).
0.355555555...

Answers

Answer:

just write 0.35 and write a line like this "---" above the five since it's the number repeating.

Step-by-step explanation:

What is the solution to the system of equations?

{2x+3y=23
4x−5y=13

Answers

The answer is (7, 3)

100 is 10 times much as

Answers

Answer:

?? If you answer is how does 10 become 100, you multiply 10 by 10?? Sorry

Step-by-step explanation:

Answer:

100 is 10 times as much as 10

Step-by-step explanation:

10 times 10 is 100.

I need help with this answer

Answers

First one bababoi. Bababoi

Answer:

the answer is A.

Step-by-step explanation:

5^4 is just saying 5x5x5x5

(81x^2)^1/2


Simplify.

Answers

Answer:

9x

Step-by-step explanation:

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