MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Estimation
A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.
Question
A researcher wishes to​ estimate, with 95​%
​confidence, the population proportion of adults who eat fast food four to six times per week. Her estimate must be accurate within
5​% 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 26​% of the respondents said they eat fast food four to six times per week.
​(c) Compare the results from parts​ (a) and​ (b).
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