researcher wishes to estimate, with 99% confidence, the population proportion of adults who eat fast food four to six times per week. Her estimate must be accurate within 2% of the population 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 22% of the respondents said they eat fast food four to six times per week. (c) Compare the results from parts (a) and (b).
researcher wishes to estimate, with 99% confidence, the population proportion of adults who eat fast food four to six times per week. Her estimate must be accurate within 2% of the population 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 22% of the respondents said they eat fast food four to six times per week. (c) Compare the results from parts (a) and (b).
College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.7: Probability
Problem 8E: List the sample space of each experiment. Picking a one-digit number
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A researcher wishes to estimate, with
99%
confidence, the population proportion of adults who eat fast food four to six times per week. Her estimate must be accurate within
2%
of the population 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
22%
of the respondents said they eat fast food four to six times per week.(c) Compare the results from parts (a) and (b).
(a) What is the minimum sample size needed assuming that no prior information is available?
n=16921692
(Round up to the nearest whole number as needed.)Expert Solution
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