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
ratelena [41]
3 years ago
9

7. (Sec. 7.2) In a survey of 2004 American adults, 501 of them said that they believed in astrology. (a) Calculate and interpret

a confidence interval at the 95% confidence level for the proportion of all adult American adults who believe in astrology. (b) Calculate and interpret a 95% lower confidence bound for the proportion of all adult American adults who believe in astrology.

Mathematics
2 answers:
Salsk061 [2.6K]3 years ago
4 0

Find the given attachments for complete answer

Salsk061 [2.6K]3 years ago
3 0

Answer:

The 95% confidence interval for the proportion for the American adults who believed in astrology is (0.23, 0.27).

This means that we can claim with 95% confidence that the true proportion of all American adults who believed in astrology is within 0.23 and 0.27.

Step-by-step explanation:

We have to construct a 95% confidence interval for the proportion.

The sample proportion is p=0.25.

p=X/n=501/2004=0.25

The standard deviation can be calculated as:

\sigma_p=\sqrt{\dfrac{p(1-p)}{n}}=\sqrt{\dfrac{0.25*0.75}{2004}}=\sqrt{ 0.000094 }=0.01

For a 95% confidence interval, the critical value of z is z=1.96.

The margin of error can be calculated as:

E=z\cdot \sigma_p=1.96*0.01=0.0196

Then, the lower and upper bounds of the confidence interval can be calculated as:

LL=p-E=0.25-0.0196=0.2304\approx0.23\\\\UL=p+E=0.25+0.0196=0.2696\approx 0.27

The 95% confidence interval for the proportion for the American adults who believed in astrology is (0.23, 0.27).

This means that we can claim with 95% confidence that the true proportion of all American adults who believed in astrology is within 0.23 and 0.27.

You might be interested in
What is the 1st quartile in the data set 65 90 100 72 88 55 73
dem82 [27]
Im pretty sure the answer is 65
7 0
3 years ago
You have 2 credit cards. If your budget $375 to pay off your credit card debt and you pay off the highest interest card first wh
Dvinal [7]

Answer:

the answer is b

Step-by-step explanation:

7 0
3 years ago
Titus drew a circle with his compass. The circle has five central angles. Four of the angles measure 55°, 37°, 96°, and 88°. Wha
Fiesta28 [93]

Answer:

84°

Step-by-step explanation:

The circle has five central angles that together equal to 360°.

55° + 37° + 96° + 88° = 276°

Hence, to find the fifth central angle, we have to subtract 276° from 360°.

360° - 276° = 84°

The degree measure of the last central angle is 84°.

Hope this helps! :)

3 0
1 year ago
Read 2 more answers
Jared made 12 3/4 cups of snack mix for cups of snack mix for a party. His guests are 2/3 of the mic. How much snack mix did his
Rufina [12.5K]

Answer:

8  1 /2

For this we need to determine what  

2 /3 of 12 3/4 is, so we multiply the fractions together.

4 0
2 years ago
PLSSS HELPP!!!!!! WILL GIVE BRAINLIEST
mestny [16]

Answer:

a) 1 (the slope)

b) for every one ounce of sugar you eat, you can one ounce of weight

3 0
2 years ago
Other questions:
  • Angles U and V are supplementary angles. The ratio of their measures is 7:13 Find the measure of each angle
    10·1 answer
  • What multiplies to 72 and adds to -17
    12·1 answer
  • Assume that we want to construct a confidence interval. Do one of the​ following, as​ appropriate:
    15·1 answer
  • What is the slope of the line that passes through the points ( 4 , − 2 ) (24,−17)? Write your answer in simplest form.
    6·2 answers
  • At least 96.00​% of the data in any data set lie within how many standard deviations of the​ mean? Explain how you arrived at yo
    5·1 answer
  • Danny and his classmates placed colored blocks on a scale during a science lab. The red block weighed 1.5 pounds and the yellow
    9·1 answer
  • HELP ME ASAPP!!<br><br>Explain and correct the error in the textbox below. <br>​
    12·1 answer
  • What is the volume of a rectangular prism with the dimensions
    15·1 answer
  • Solve the system by any method. <br> (3x – 4y = -5<br> (5x + 8y = -1
    12·2 answers
  • there were v crayons In a box.1/6 of the crayons were new.angie added another 24 new crayons to the box and there are 30 new cra
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!