A marketing research consultant hired by CocaCola is intrest

A marketing research consultant hired by Coca-Cola is intrested in determining if the proportion of customers who prefer coke to other brands is over 50%. A random sample of 200 customers was selected from the market under investigation, 55% favored Coca-Cola over other brands.

If you were to conduct a hypothesis test to determine if greater that 50% of customers prefer Coca-Cola to other brands, would you conduct a one-tail or two-tail hypothesis test? Eplain your answer. What are the null (H0) hypothesis and the alternate (H1) hypothesis.

Using a 5 % significance level, can the marketing consultant conclude that the proportion of customers who prefer Coca-Cola exceeds 50%?

What is the Statistical test you should use?

Reject H0 if the Z statistic is           (greater thatn) or (less than)          the T table Value

Write the formula for computing the Z-statistics and fill in the values.

      Z-statistic=

Solution