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A chain store decides to test the effectiveness of a new form of packaging for one of its products. In two of its stores, in similar environments and with similar sales profiles, it arranges similar displays of the product. Of the first 100 customers that enter store A, 8 buy the product with the old packaging. Of the first 100 customers that enter store B, 20 buy the product with the new packaging. Calculate the value of χ2. The null hypothesis is that the new packaging is ineffective. If the probability that the value ofχ2, or some larger value, could be obtained with the null hypothesis just by chance is greater than 0.05, then the store will not bother to change the packaging. Do they change it or not?

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M92777688

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