Question
A marketing research consultant hired by Coca-Cola is interested in determining if the proportion of customers who prefer Coke to other brands is over 50%.A
A marketing research consultant hired by Coca-Cola is interested in determining if the proportion of customers who prefer Coke to other brands is over 50%.A random sample of 200 consumers was selected from the market under investigation, 55% favored Coca-Cola over other brands.Additional information is presented below.
Sample proportion
0.55
Standard error of sample proportion
0.03518
Z test statistic
1.4213
If you were to conduct a hypothesis test to determine if greater than 50% of customers prefer Coca-Cola to other brands, would you conduct a one-tail or a two-tail hypothesis test?Explain your answer.
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