1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Hitman42 [59]
3 years ago
10

The National Health Interview Survey, which included a questionnaire administered during in-person interviews with 21,781 adults

, found that 20.6 percent of them were smokers in 2008. (New York Times, Nov 18, 2009). Round your numbers to 3 decimal places. Find a 95% confidence interval for the proportion of American adults who smoked in 2008
Mathematics
1 answer:
Flauer [41]3 years ago
3 0

Answer:

The 95% confidence interval for the proportion of American adults who smoked in 2008 is (20.1%, 21.1%).

Step-by-step explanation:

The critical value of <em>z</em> for 95% confidence level is:

<em>z</em> = 1.96

Compute the 95% confidence interval for the proportion of American adults who smoked in 2008 as follows:

CI=\hat p\pm z_{\alpha/2}\cdot\sqrt{\frac{\hat p(1-\hat p)}{n}}

     =0.206\pm 1.96\times\sqrt{\frac{0.206(1-0.206)}{21781}}\\\\=0.206\pm 0.0054\\\\=(0.2006, 0.2114)\\\\\approx (0.201, 0.211)

Thus, the 95% confidence interval for the proportion of American adults who smoked in 2008 is (20.1%, 21.1%).

You might be interested in
In how many ways can you select a committee of 3 students out of 10 students ?
Alex_Xolod [135]
I’m not sure but I think it’s 6 ways
5 0
3 years ago
Please Help Me!<br> This worth 25 points !<br> ASAP PLEASE PLEASE . . .
mixas84 [53]

Answer:

Angle PAB is a right angle.

Step-by-step explanation:

Angle PAB is a right angle.  In circles, tangent lines are always perpendicular to radii.

6 0
3 years ago
In which graph is y a direct variation of x?<br> A.<br> B.<br> C.<br> D.
TEA [102]

Answer:

D

Step-by-step explanation:

The line is going through the origin.

8 0
3 years ago
The Reunion Tower in Dallas, Texas, is topped by a spherical dome that has a surface area of approximately 13,924 \pi square fee
Salsk061 [2.6K]

The volume of the spherical dome will be 12.9π cubic feet when the surface area of the dome is 13.924π.

<h3>What is the volume of the sphere?</h3>

The volume of the cone is the amount of quantity, which is obtained in the 3-dimensional space. The dome is the shape of a semi-sphere the volume of the dome will be half of the volume of the sphere.

Given that the Reunion Tower in Dallas, Texas, is topped by a spherical dome that has a surface area of approximately 13,924π square feet.

The volume of the dome will be calculated as below:-

SA = 13.924π

2πr² = 13.92π

r = √6.96

r = 2.63 feet

Volume = 2 / 3 πr³

Volume = ( 2 / 3 ) π ( 2.63)³

Volume = 12.24π cubic feet

Therefore, the volume of the spherical dome will be 12.9π cubic feet.

To know more about volume follow

brainly.com/question/24247548

#SPJ1

7 0
1 year ago
PLZ I NEED HELP!!! THIS IS TIMED!!!! PLZ HELP ME!
wel

Answer:

it is b

Step-by-step explanation:

hope i helped

5 0
3 years ago
Read 2 more answers
Other questions:
  • to make a greeting card Bryce use 1/8 sheet of red paper 3/8 sheet of green paper and 7/8 sheet of white paper how many sheets o
    5·2 answers
  • How many values of θ will satisfy tan-1 0 = θ when 0º&lt;θ&lt;90º?
    13·1 answer
  • Solve the following system of equations graphically.
    11·2 answers
  • Please help someone
    12·1 answer
  • What number should both sides of the following equation be multiplied by to solve for x?
    9·1 answer
  • Archie is itemizing deductions on his federal income tax return and had
    8·2 answers
  • I needs someone’s help ASAP!!!!!
    14·1 answer
  • F(x) = (x - 5) (2x - 7) (7x - 3) has zeros at x = -3.5, x = 3/7, and x = 5.
    14·2 answers
  • 6. What is the first step when looking at a data set?
    9·1 answer
  • Need help with this as soon as possible, answer quick
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!