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A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of adults who think the...

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Statistics

A researcher wishes to​ estimate, with 95​% ​confidence, thepopulation proportion of adults who think the president of theircountry can control the price of gasoline. Her estimate must beaccurate within 44​% of the true proportion.

​a) No preliminary estimate is available. Find the minimumsample size needed.

​b) Find the minimum sample size​ needed, using a prior studythat found that

46​% of the respondents said they think their president cancontrol the price of gasoline.

​c) Compare the results from parts​ (a) and​ (b).

Answer & Explanation Solved by verified expert
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Solution Given thata 0051 005margin of error E 004Z2    See Answer
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