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
olga_2 [115]
2 years ago
5

The sample size needed to estimate the difference between two population proportions to within a margin of error E with a signif

icance level of ? can be found as follows. In the expression
E=z?p1(1?p1)n1+p2(1?p2)n2?????????????????????????
we replace both n1 and n2 by n (assuming that both samples have the same size) and replace each of p1, and p2, by 0.5 (because their values are not known). Then we solve for n, and get
n=(z?)22E2.
Finally, increase the value of n to the next larger integer number.
Use the above formula and Table C to find the size of each sample needed to estimate the difference between the proportions of boys and girls under 10 years old who are afraid of spiders. Assume that we want a 99% confidence level and that the error is smaller than 0.07.
n=______.
Mathematics
1 answer:
devlian [24]2 years ago
3 0

Answer:

n= (z)22E2

n=10× 99%÷ 0.07

You might be interested in
1. Write the name of the properties:
faust18 [17]

Answer:

a) Commutative property of addition

b) Identity Property of Multiplication

c) Identity Property of Addition

d) Associative Property of Addition.

Step-by-step explanation:

6 0
1 year ago
Do anyone know the answer to this? Answers please?
Amanda [17]

Answer:

Yes

Step-by-step explanation:

You can check whether the ratios form a proportion, by setting one piece of the ratios as x

Thus, we can use the equation 4/3.2=22/x.

From this, we get 4x=70.4.

Solving for x gives us 17.6.

5 0
2 years ago
The largest jaw breaker in a store is spherical with a radius of 2 in, and sells for $4.00. A
maw [93]

Answer:

$36

Step-by-step explanation:

1. Determine the surface area of the  largest jaw breaker

Surface area of a sphere = 4πr²

4 x 3.14 x 2² = 50.24in²

2. Determine the surface area of the new jaw breaker

4 x 3.14 x 6² = 452.16 in²

3. Determine the cost per area

4/ 50.24

4. Determine the price for the new jaw breaker

4/ 50.24 x 452.16 = $36

5 0
2 years ago
Slope of (16, 8) (8, 4)
Tom [10]

Answer:

slope of (16,8) (8,4) is 1/2

8 0
2 years ago
What is 33 1/3% profit if $4800
shutvik [7]

Answer:

The left side 33.3 does not equal to the right side 4800, which means that the given statement is false Hope this helps

Step-by-step explanation:

I don't know if u meant converting to a percentage But i guess thats your Answer

4 0
2 years ago
Read 2 more answers
Other questions:
  • NEED HELP FAST PLEASE!! Draw the base plan for the set of stacked cubes, assume the no cubes are hidden from view.
    14·2 answers
  • How do you find the area of a rectangle
    9·2 answers
  • How do I subtract nine minus three elevenths it doesn't make sense please help I just don't understand they didn't help us in cl
    8·2 answers
  • Math questions, pls help me and ill reward <3 : )
    14·1 answer
  • Factor the equation x^2 -7x+10
    11·1 answer
  • Someone plssss help ILL GIVE BRAINLIEST
    12·1 answer
  • SLOPE<br>3. If you're given the points: <br>(4, 10) (8, 9) <br>What are your y1 and y2? ​
    8·2 answers
  • Calcula un numero sabiendo que la suma de sus dos cifras es 10 y que si invertimos el orden de dichas cifras, el numero obtenido
    8·1 answer
  • 20 points!!
    10·1 answer
  • Write an equation for each line
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!