Reference no: EM13110467
An environmental agency recently claimed more than 28% of consumers have stopped buying a certain product because of environmental concerns. In a random sample of 1078 customers, you find 40% have stopped buying the product. At a=0.04, do you have enough evidence to support claim.
a) Write the claim mathematically to identify Ho and Ha = ????? (ie. >,=,<)
b) What is (are) the critical values)s) Zo?
Zo = ??? (use comma to separate answer as needed and round two decimal places)
c) What is the standardized test statistic?
Z = ???? (round three decimal places)
d) Which conclusion statement is correct below? (select one)
Fail to reject Ho. There is enough evidence to support claim.
Reject Ho. There is not enough evidence to support claim.
Reject Ho. There is enough evidence to support claim.
Fail to reject Ho. There is not enough evidence to support claim.
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