# At a major credit card bank, the percentages of people who historically apply for the Silver, Gold, and Platinum cards are 60%, 30%, and 10%, respectively. In a recent sample of customers responding to a promotion, of 200 customers, 110

At a major credit card bank, the percentages of people who historically apply for the Silver, Gold, and Platinum cards are 60%, 30%, and 10%, respectively. In a recent sample of customers responding to a promotion, of 200 customers, 110 applied for Silver, 55 for Gold, and 35 for Platinum. Is there evidence to suggest that the percentages for this promotion may be different from the historical proportions?

a) What is the expected number of customers applying for each type of card in this sample if the historical proportions are still true?

b) Compute the x^{2} statistic.

c) How many degrees of freedom does the x^{2} statistic have?

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## a If the historical proportions are still true then the expected number …View the full answer

**Related Book For**

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**ISBN:** 9780321925831

3rd Edition

**Authors:** Norean Sharpe, Richard Veaux, Paul Velleman

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