Question

In a survey on corporate​ ethics, a poll split a sample at​ random, asking 526 faculty and corporate recruiters the​ question: "Generally​ speaking, do you believe that MBAs are more or less aware of ethical issues in business today than five years​ ago?" The other half were​ asked: "Generally​ speaking, do you believe that MBAs are less or more aware of ethical issues in business today than five years​ ago?" These may seem like the same​ question, but sometimes the order of the choices matters. In response to the first​ question, 55​% thought MBA graduates were more aware of ethical​ issues, but when the question was phrased​ differently, this proportion dropped to 44​%. Complete parts a through c. ​a) What kind of bias may be present​ here? A. Nonresponse bias B. Voluntary response bias C. Response bias ​b) Each group consisted of 526 respondents. If we combine​ them, considering the overall group to be one larger random​ sample, what is a 90​% confidence interval for the proportion of the faculty and corporate recruiters that believe MBAs are more aware of ethical issues​ today? left parenthesis nothing % comma nothing % right parenthesis ​(Round to one decimal place as​ needed.) ​c) How does the margin of error based on this pooled sample compare with the margins of error from the separate​ groups? Why? A. The margin of error based on the pooled sample is smaller since the sample size is larger. B. The margin of error based on the pooled sample is larger since the sample size is larger. C. The margin of error based on the pooled sample falls between the margins of error for the separate groups since its sample proportion is the mean of the two separate​ groups' sample proportions.

Answer 1

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