An advertising company claims that 80 % of stores that use their advertisements show increased sales. A
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An advertising company claims that 80 % of stores that use their advertisements show increased sales. A random sample of 100 stores that used the company’s advertisements reveals that 80 showed increased sales.
Test, at the 5 % level of significance, whether at least 75 % of stores using the advertisements had increased sales.
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Related Book For
Statistics For Business And Financial Economics
ISBN: 9781461458975
3rd Edition
Authors: Cheng Few Lee , John C Lee , Alice C Lee
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