(Answered) Question companies are spending more time screening

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Question: Companies are spending more time screening applicants than in the past. A study of 102 recruiters conducted by ExecuNet found that 77 did Internet research on candidates. (Extracted from P. Kitchen, Don t Let Any Digital Dirt Bury Your Job Prospects, Newsday, August 21, 2005, p. A59).

a. Construct a 95% confidence interval estimate of the population proportion of recruiters who do Internet research on candidates.

b. Based on (a), is it correct to conclude that more than 70% of recruiters do Internet research on candidates?

c. Suppose that the study uses a sample size of 400 recruiters and 302 did Internet research on candidates. Construct a 95% confidence interval estimate of the population proportion of recruiters who do Internet research on candidates.

d. Based on (c), is it correct to conclude that more than 70% of recruiters do Internet research on candidates?

e. Discuss the effect of sample size on your answers to (a) through (d).

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