To determine the effectiveness of the College of Business advertising campaign for the new Masters of Marketing, the Dean’s office would like to know what percentage of the entering grad students are aware of the new program. The marketing department thinks that this figure is as high as 60 percent. The Dean’s office would like a 95% confidence interval and a margin of error no greater than plus or minus 4 percent. a) What sample size should be used for this study? b) Suppose that using the sample size in part a, the marketing department collected some data and found that 55% of grad students know about the new program. Construct a 90% confidence interval for this finding.
To determine the effectiveness of the College of Business advertising campaign for the new Masters of Marketing, the Dean’s office would like to know what percentage of the entering grad students are aware of the new program. The marketing department thinks that this figure is as high as 60 percent. The Dean’s office would like a 95% confidence interval and a margin of error no greater than plus or minus 4 percent.
a) What sample size should be used for this study?
b) Suppose that using the sample size in part a, the marketing department collected some data and found that 55% of grad students know about the new program. Construct a 90% confidence interval for this finding.
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