Answer:
c
Explanation:
4. An organization that strives to hold agencies accountable for truth in news reporting plans to select a random sample of 100 news stories from major U.S. news agencies in order to estimate the proportion of news stories produced by major U.S. news agencies that contain false information. A 90 percent confidence interval for the proportion of all news stories that contain false information will then be constructed. Before selecting the sample, the organization determines that they want to make the margin of error as small as possible. Which of the following is the best way for them to decrease the margin of error?
(A)Increase the confidence level to 95%.
(B)Increase the confidence level to 99%.
(C) Include a wider diversity of sources, such as local and international news agencies.
(D)Include news stories over a broad period of time, such as over the past decade.
(E) Increase the sample size.
Answer: E) Increase the sample size
Explanation: with the confidence level and sample proportion held constant, the margin of error will decrease as the sample size increases.
8. Candidate A and Candidate B are running for president. You are planning a survey to determine what proportion of registered voters plan to vote for Candidate A (p). You will contact a random sample of registered voters. You want to estimate p with 99% confidence and a margin of error no greater than 0.01. What is the minimum number of registered voters you will need to survey in order to meet these requirements?
(A)97
(B)166
(C)6,766
(D)9,604
(E)16,590
Answer:
The correct answer is (E).
The minimum sample size of registered voters that are needs to be surveyed in order to meet these requirements is 16590 registered voters.
What is the required sample size?The sample size, n, can be calculated using the formula below:
[tex]n = \frac{z^{2}×p(1-p)}{(\frac{ε}{2}) ^{2}}[/tex]
where:
z = is the z scoreε is the margin of errorpis the population proportionFor the data provided:
z for 99% confidence = 2.58
ε/2 = 0.005
p = 0.5
Substituting the values:
[tex]n = \frac{2.58^{2}×0.5(1-0.5)}{0.005^{2}} = 16641[/tex]
Therefore, the minimum sample size of registered voters that are needs to be surveyed in order to meet these requirements is 16590 registered voters.
Learn more about sample size at: https://brainly.com/question/24084761
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How do fishing gears cause decrease in the population of marine species?
A) by changing water drifts
B) by decreasing phytoplankton population
by causing loss of habitat
D) by increasing water salinity
Please select the best answer from the choices provided
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OOO
O
Answer:
wrong its d
Explanation:
How did monasticism impact Buddhism?
YOU WILL GET BRAINLIEST!! What could help a country move from Stage 1 to Stage 2 of the demographic
transition?
- Instituting population restrictions
-increased immigration
-The diffusion of contraceptives
-better sanitation
-Improving education for women
Answer:
i would think population restrictions
Explanation
stage 2 is characterized by a rapid decrease in a country’s death rate so the total population of a country in Stage 2 will rise