Question
In: Statistics and Probability
(1 point) A poll is taken in which 388 out of 600 randomly selected voters indicated...
(1 point) A poll is taken in which 388 out of 600 randomly selected voters indicated their preference for a certain candidate.
(a) Find a 99% confidence interval for p (....... ≤p≤........)
(b) Find the margin of error for this 99% confidence interval for p.
Solutions
Expert Solution
p = 388/600 = 0.6467
b) Z for 99% confidence interval = Z0.005 = 2.575
Margin of error = Z0.005 * sqrt(p * (1 - p) / n)
= 2.575 * sqrt(0.6467 * (1 - 0.6467) / 600)
= 0.0502
a) Confidence interval = p + margin of error
= 0.6467 + 0.0502
= 0.5965 < p < 0.6969
orchestra answered 1 year agoRelated Solutions
(1 point) A poll is taken in which 350 out of 600 randomly selected voters indicated...
(1 point) A poll is taken in which 350 out of 600 randomly
selected voters indicated their preference for a certain
candidate.
(a) Find a 90% confidence interval for p.
I keep getting 58.2 and 58.4 which is wrong
(b) Find the margin of error for this 90% confidence interval
for p.
A poll is taken in which 350 out of 525 randomly selected voters indicated their preference...
A poll is taken in which 350 out of 525 randomly selected voters
indicated their preference for a certain candidate.
(a) Find a 99% confidence interval for p.:_______
≤p≤________
(b) Find the margin of error for this 99% confidence interval
for p.:___________
A poll is taken in which 310 out of 525 randomly selected voters indicated their preference...
A poll is taken in which 310 out of 525 randomly selected voters
indicated their preference for a certain candidate. (a) Find a 90 %
confidence interval for p . ≤ p≤
(b) Find the margin of error for this 90 % confidence interval
for p .
(c) Without doing any calculations, indicate whether the margin
of error is larger or smaller or the same for an 80% confidence
interval.
A poll is taken in which 349 out of 500 randomly selected voters indicated their preference...
A poll is taken in which 349 out of 500 randomly selected voters
indicated their preference for a certain candidate.
Find the margin of error for this 99% confidence interval for
p.
A poll is taken in which 367367 out of 600600 randomly selected voters indicated their preference...
A poll is taken in which 367367 out of 600600 randomly selected
voters indicated their preference for a certain candidate. Find a
8080% confidence interval for pp.
Kim wants to determine a 80 percent confidence interval for the
true proportion of high school students in the area who attend
their home basketball games. How large of a sample must she have to
get a margin of error less than 0.02? [If no estimate is known for
p, let p^p^ =...
A poll is taken in which 265 out of 1000 randomly selected voters indicated their preference...
A poll is taken in which 265 out of 1000 randomly selected
voters indicated their preference for a certain candidate. Find a
90% confidence interval. Remember σpˆ = ?pˆ(1−pˆ)
(a)
[4 pts] Find Zα/2:
(b)
[4 pts] Find the confidence interval:
(c)
[4 pts] Find the margin of error:
(d)
[4 pts] Without doing any calculations, indicate whether the
margin of error is larger or smaller or the same for a 95%
confidence interval. Why you think so?
A poll is taken in which 324 out of 550 randomly selected voters indicated their preference...
A poll is taken in which 324 out of 550 randomly selected voters
indicated their preference for a certain candidate.
(a) Find a 99% confidence interval for ?.
≤?≤
(b) Find the margin of error for this 99% confidence interval for
?.
(c) Without doing any calculations, indicate whether the margin of
error is larger or smaller or the same for an 80% confidence
interval.
A. smaller
B. larger
C. same
A poll is taken in which 348 out of 525 randomly selected voters indicated their preference...
A poll is taken in which 348 out of 525 randomly selected voters
indicated their preference for a certain candidate.
(a) Find a 99% confidence interval for p.
≤. p. ≤.
(b) Find the margin of error for this 99% confidence interval for
p.
A poll is taken in which 349 out of 500 randomly selected voters indicated their preference...
A poll is taken in which 349 out of 500 randomly selected voters
indicated their preference for a certain candidate. (a) Find a 99%
confidence interval for p. ≤p≤ (b) Find the margin of error for
this 99% confidence interval for p.
(1 point) A poll of ? n voters is to be taken in an attempt to...
(1 point) A poll of ? n voters is to be taken in an attempt to
predict the outcome of a by-election in a certain riding.
Specifically, you are interested in the proportion of voters that
will vote for a certain candidate, Candidate A. ?=440 n = 440
voters have been randomly chosen, each has indicated what candidate
they will vote for. You are to count the number, out of 440, who
say they will vote for Candidate A. This...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Submit a topic for your Security paper. Pick a topic for a 5-6 page paper on...
- 1. Define intercultural competence. 2. Describe the importance of being interculturally competent and what it means...
- write about The expected role and direction of education quality after IR 4.0 note: - minimum...
- What are your pre-conceptions about single-case research designs? Does conducting research evaluating the behavior of a...
- 1. Convert the binary data “110101” into analog waveforms using following modulation techniques: a. Two level...
- Discuss DLP and methods companies can use to prevent it.
- A steam power plant operates on an ideal regenerative Rankine cycle. Steam enters the turbine at...
ADVERTISEMENT