In an Accountemps survey of 150 senior executives, 47% said that the most common job interview mistake is to have little or no knowledge of the company.   Construct a 99% confidence interval estimate of the proportion of all senior executives who have that same opinion. Is it possible that exactly half of all senior executives believe that the most common job interview mistake is to have little or no knowledge of the company? Be sure to explain why or why not.

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In an Accountemps survey of 150 senior executives, 47% said that the most common job interview mistake is to have little or no knowledge of the company.

 

  1. Construct a 99% confidence interval estimate of the proportion of all senior executives who have that same opinion.

  2. Is it possible that exactly half of all senior executives believe that the most common job interview mistake is to have little or no knowledge of the company? Be sure to explain why or why not.

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