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
Akimi4 [234]
3 years ago
11

In a simple random sample of 1300 voters, 19% said they would prefer to vote online.

Mathematics
1 answer:
dsp733 years ago
8 0

Solution:

Formula for calculation of 99% confidence interval is given by:

= P \pm (\text{Z value} )\sqrt\frac {P\times(1-P)}{N}

P= Sample Proportion

N =Sample Size

Also,Number of voters who vote online=  19 % of 1300=19 × 13=247

Sample Population= =\frac{247}{1300}=0.19

Z value for 99% confidence interval=2.58

The number of voters who vote online, who are in the 99% confidence interval for the percent of all voters who would prefer to vote online= 0.19 \pm (2.58)\sqrt\frac{0.19 \times (1-0.19)}{1300}\\\\ =0.19 + (2.58)\sqrt\frac{0.19 \times (1-0.19)}{1300} {\text{or}} 0.19 - (2.58)\sqrt\frac{0.19 \times (1-0.19)}{1300}\\\\ 0.2180 {\text{or}} 0.1619

So, Percent of voters , who  are in the 99% confidence interval for the percent of all voters who would prefer to vote online= 100 × 0.2180 or 100 × 0.1619=21.80 % or 16.19 %

That is between, 16.19 % and 21.80 %.

→→Option (A) 19.8 % and Option (B)17.4 % are in 99 % confidence intervals.


You might be interested in
The equation below represents Function A and the graph represents Function B:
Snezhnost [94]

Answer:

Slope of Function B = – Slope of Function A

Step-by-step explanation:

Slope of function A=-2

Slope of function B=$\frac{3-1}{3-2}=2$

6 0
3 years ago
Read 2 more answers
One-third cup of black beans provides 20% of the potassium you need daily. You must get the remaining 1,360 milligrams from othe
Elis [28]
80 percent of needed milligrams is 1360
so

1360/.80 = x/1

Answer: 1700 milligrams
3 0
3 years ago
Stephanie is going to contribute $300 on the first of each month, starting today, to her retirement account. Her employer will p
gayaneshka [121]

Answer:

2.123.007

Step-by-step explanation:

4 0
3 years ago
How can you quickly determine the number of roots a polynomial will have by looking at the equation?
Goryan [66]
First, you need to get delta which is b squared minus 4ac. If delta is higher than cero, the polynomial has two solutions, if it is less, the polynomial has no real solutions and if it is the same, it has one solution.
Although that is only for second grade ecuations
7 0
3 years ago
Read 2 more answers
Hi got a question!
Eddi Din [679]

Answer:

Total no. of balls = 8

Red balls = 3

Yellow balls = 2

Green balls = 3

Now,

P (picking a yellow ball) = 2/8 = 1/4

P (picking a green ball) = 3/8

♥️Mark as brainliest♥️

5 0
3 years ago
Other questions:
  • Need help ASAP math
    7·1 answer
  • Please help me solve this problem
    10·1 answer
  • A square has side length (7 x − 2) inches. what is the area of the square?
    15·1 answer
  • For the function f(x) = 6x - 8, identify the values of f(o), f(1/2), and f(-2).
    12·2 answers
  • What is -0.8 as a fraction?
    8·2 answers
  • From the top of an 95 meter cliff, Tim spots a hiker down below at an angle
    12·1 answer
  • In 1992, Jason bought a gallon of gas for $1.17. Yesterday, he bought a gallon of gas for $2.19. What is the percentage increase
    10·2 answers
  • Gwen is two years older than her cousin Julie. Aunt Jess is twice as old as uncle Mark. Julie’s age is 26 less than the sum of a
    12·1 answer
  • A local little league has a total of 70 players, of whom 40% are left-handed. How marly
    5·2 answers
  • You loaned a friend $100 and will charge him 5% annual simple interest when he pay it back
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!