A manufacturer claims that at least 40% of its customers use coupons. A study of 25 customers is undertaken to test that claim. The results of the study follow. 
At a .05 level of significance, use Excel to test the manufacturer's claim.
Definitions:
Consistent
Describes a system or behavior that does not contain contradictions and adheres to the same principles, standards, or patterns over time.
Contingency
A statement or proposition that is neither necessarily true nor necessarily false, depending on some variables or conditions.
Biconditional Statement
A statement that is true only if both components are simultaneously true or false.
Consistent
In logic and mathematics, a set of statements or propositions is consistent if they do not lead to a contradiction, meaning they can all be true at the same time.
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