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
Orlov [11]
3 years ago
6

The poll found that 38% of a random sample of 1012 American adults said they believe in ghosts. What is the lower bound for a 90

% confidence interval for the percentage of all American adults who believe in ghosts?
Mathematics
1 answer:
Brrunno [24]3 years ago
6 0

Answer:

The lower bound for a 90% confidence interval for the percentage of all American adults who believe in ghosts is 0.3549

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 1012, \pi = 0.38

90% confidence level

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.38 - 1.645\sqrt{\frac{0.38*0.62}{1012}} = 0.3549

The lower bound for a 90% confidence interval for the percentage of all American adults who believe in ghosts is 0.3549

You might be interested in
How would I find the slope of this equation y=3x+8-12x
Nostrana [21]
Combine like terms
Y=-9x+8
And your slope would be -9
3 0
3 years ago
What is the distance?(-4,2) (-2,-2)
slava [35]
It is 2x and 4y, so you need to use pythagorean theorem. 2 squared is 4, and 4 squared is 16. Add them, and you get 20. The problem is that that won't square to a whole number, so the closest I can get it is the square root of 20, or 2 root 4.
8 0
3 years ago
An arithmetic progression is a sequence of numbers in which the distance (or difference) between any two successive numbers if t
notsponge [240]

Answer:[m, m+d, m+2d, - - - - -, n]

Step-by-step explanation:

We know the formula for arithmetic progression is a_(n) = a_(1) + (n-1)d

Where a_(n) is the nth term of the sequence

a_(1) is the first term of the sequence

n is the number of the term like if we are talking about 7th term so the n is 7.

d is the difference between two successive terms.

For this problem we know our first term that is m, our last term that is n and our difference that is d.

For second term we will use the formula

a_(2) = m + (2-1)d

a_(2) = m + (1)d

a_(2) = m + d

Similarly,

a_(3) = m + (3-1)d

a_(3) = m + (2)d

a_(3) = m + 2d

3 0
3 years ago
HELP , TIMES ALMOST UP!!!!!!
solong [7]

Answer:

0.8660254 or √3/2

Step-by-step explanation:

6 0
3 years ago
The area of a triangle is 18. The base is 6 inches. What is the height?
attashe74 [19]

Answer:

the hight of your triangle is six inches

7 0
2 years ago
Other questions:
  • If 3A and 3B, then which of the following statements is not true?
    15·1 answer
  • Given: -5x+2/7=-4 Prove: x=6
    12·1 answer
  • What is the sum of the polynomials?
    14·1 answer
  • How many different arrangements can be made with the letters in the word POWER?
    9·1 answer
  • Name the values represented by the box plot.
    11·1 answer
  • 37. What is the value of x?<br> (4x + 12)<br> A 12<br> C 18<br> B 19.5<br> D 60
    6·1 answer
  • PLEASE HELP A rental company charges $75 per hour for a jet ski plus $5 fee for a life jacket. What would the cost be for 2 life
    14·1 answer
  • A recipe says to use 3 cups of flour to make 48 cookies. What is the constant of proportionality that relates the number of cook
    12·2 answers
  • Jenny, Keith, and Joanna participated in a mini-
    9·1 answer
  • Measurements of human skulls from different epochs are analyzed to determine whether they change over time. The maximum breadth
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!