A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be accurate within 3​% 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 38​% of the respondents said they think Congress is doing a good or excellent job. ​(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= ​(Round up to the nearest whole number as​ needed

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Q: Please view the question in the photo and answer the following questions. TY! (A) What is the…

A: Given,margin of error (E)=0.02α=1-0.90=0.1α2=0.05Z0.05=1.645   (from Z-table)

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Q: A researcher wishes to​ estimate, with 99​% ​confidence, the population proportion of likely U.S.…

A: Given that  Margin of error =E =4%=0.04 99% confidence level.

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A:

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: Given data,E=3%=0.03Z-value at 90% confidence is Zc=1.645

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A:

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.