A market research consultant hired by a leading soft drink company wants to determine the proportion of
Question:
a. Find a 90% confidence interval for the proportion of all consumers in this market who prefer the company’s brand.
b. The file contains the gender and age group for each customer in the sample. Find a separate 90% confidence for each gender for the proportion who prefer the company’s brand. Then do the same for each age group. Explain briefly how these confidence intervals compare to each other and to the confidence interval in part a.
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Related Book For
Data Analysis and Decision Making
ISBN: 978-0538476126
4th edition
Authors: Christian Albright, Wayne Winston, Christopher Zappe
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