Before the rush began for Christmas shopping, a department store had noted that the percentage of its customers who use the store's credit card, the percentage of those who use a major credit card, and the percentage of those who pay cash are the same. During the Christmas rush, in a sample of 210 shoppers, 66 used the store's credit card; 63 used a major credit card; and 81 paid cash. With?= .05, test to see if the methods of payment have changed during the Christmas rush.
What will be an ideal response?
?2 = 2.66; p-value is larger than .10; no evidence of change
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