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Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section: Chapter Questions

Problem 8SGR

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Please answer the following question using ****EXCEL****

You wish to estimate, with 95% confidence, the population proportion of
U.S. adults who want more funding for alternative energy. Your estimate must be accurate
within 4% of the population proportion.
a)
b)
c)
No preliminary estimate is available. Find the minimum sample size needed.
Find the minimum sample size needed, using a prior study that found that 78% of U.S adults want more funding for alternative energy.
Compare the results from parts (a) and (b).

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When estimating the minimum sample size required for a research, if we do not have the preliminary estimate of proportion we consider p equal to
Please view the question in the photo and answer the following questions. TY! (A) What is the minimum sample size needed assuming that no prior information is available? (B) What is the minimum sample size needed using a prior study that found that 36% of the respondents said they think Congress is doing a good or excellent job?
A researcher wishes to estimate, with 90% confidence, the population proportion of likely U.S. voters who think Congress is doing a good or excellent job. Her estimate must be accurate within 1% of the true proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 18% of the respondents said they think Congress is doing a good or excellent job. (c) Compare the results from parts (a) and (b).
A researcher wishes to estimate, with 90%onfidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be accurate within 4% of the true proportion.(a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 32% of the respondents said they think Congress is doing a good or excellent job. (c) Compare the results from parts (a) and (b).
A researcher wishes to estimate, with 90% confidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be accurate within 22% of the true proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 42%of the respondents said they think Congress is doing a good or excellent job. (c) Compare the results from parts (a) and (b).
Find the minimum sample size you should use to assure that your estimate of p will be within the required margin of error around the population p.
A researcher wishes to estimate, with 90%confidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be accurate within 4% of the true proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 44% of the respondents said they think Congress is doing a good or excellent job. (c) Compare the results from parts (a) and (b).
Estimate the sample size needed if no estimate of p is available. PART B
(a) What is the minimum sample size needed assuming that no prior information is available? (b) What is the minimum sample size needed using a prior study that found that 32% of the respondents said they think Congress is doing a good or excellent job? (c) How do the results from (a) and (b) compare? A. Having an estimate of the population proportion reduces the minimum sample size needed. B. Having an estimate of the population proportion has no effect on the minimum sample size needed. C. Having an estimate of the population proportion raises the minimum sample size needed.
Use the given data to find the minimum sample size required to estimate the population proportion.
(b) If the sample size was increased to 10,000 American movie-goers, what effect would this have on the estimated percentage of American movie-goers who think the popcorn is overpriced?
Part 2 Estimate the sample size needed if no estimate of p is available.

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