Question

A political candidate has asked his/her assistant to conduct a
poll to determine the percentage of people in the community that
supports him/her. If the candidate wants a 1% margin of error at a
99% confidence level, what size of sample is needed? *Be
sure to round accordingly.*

The candidate would need to survey ?????? people in the community
in order to be within a 1% margin of error at a 99% confidence
level.

Answer #1

Solution :

Given that,

= 0.5 ( assume 0.5)

1 - = 1 - 0.5 = 0.5

margin of error = E = 1% = 0.01

At 99% confidence level the z is,

= 1 - 99%

= 1 - 0.99 = 0.01

/2 = 0.005

Z/2 = 2.58 ( Using z table )

Sample size = n = (Z/2 / E)2 * * (1 - )

= (2.58 / 0.01)2 * 0.5 * 0.5

=16641

Sample size = 16641

A political candidate has asked you to conduct a poll to
determine what percentage of people support her. If the candidate
only wants a 0.1% margin of error at a 99.5% confidence level, what
size of sample is needed? ______

A political candidate has asked you to conduct a poll to
determine what percentage of people support her.
If the candidate only wants a 5% margin of error at a 95%
confidence level, what size of sample is needed?
Give your answer in whole people.

A political candidate has asked you to conduct a poll to
determine what percentage of people support her.
If the candidate only wants a 3% margin of error at a 95%
confidence level, what size of sample is needed?
Give your answer in whole people.

A political candidate has asked you to conduct a poll to
determine what percentage of people support her.
If the candidate only wants a 10% margin of error at a 90%
confidence level, what size of sample is needed?
Give your answer in whole people

4. A political candidate has asked you to conduct a poll to
determine what percentage of people support her. If the candidate
only wants a 2% margin of error at a 90% confidence level, what
size of sample is needed? Give your answer in whole people.

In a recent poll, 560 people were asked if they liked dogs, and
66% said they did. Find the margin of error of this poll, at the
99% confidence level.

Q4. You conduct a poll comparing two candidates. In a poll of
400 people, 190 prefer candidate A, and 210 prefer B.
Q4a. What is the point estimate for the probability that a voter
will choose candidate A?
Q4b. What is the stdev for that point estimate?
Q4c. What is the 95% Confidence interval?
Q4d. What is the probability that candidate B loses in the
actual election?
Q4e. If you want to shrink one stdev error to 1%, how many...

In a recent poll, 250 people were asked if they liked dogs, and
17% said they did. Find the margin of error of this poll, at the
99% confidence level. Give your answer to three decimals

A poll taken this year asked 1006 adults whether they were fans
of a particular sport and 39 % said they were. Last year, 44 %
of a similar-size sample had reported being fans of the sport.
Complete parts a through e below
a) Find the margin of error for the poll taken this year if one
wants 95% confidence in the estimate of the percentage of adults
who are fans of the sport.
b) Explain what that margin of...

In a recent poll, 150 people were asked if they liked dogs, and
57% said they did. Find the Margin of Error for this poll, at the
99% confidence level. Give your answer to three decimal places if
possible.

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 2 minutes ago

asked 5 minutes ago

asked 5 minutes ago

asked 7 minutes ago

asked 12 minutes ago

asked 12 minutes ago

asked 15 minutes ago

asked 15 minutes ago

asked 18 minutes ago

asked 18 minutes ago

asked 18 minutes ago

asked 26 minutes ago