needs to be completed by 3:30 new york time 12/17/15

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Question 1 As part of the quality control process, a chain of grocery stores carries out a monthly comparison of scanned prices to posted prices. The results of 400 prices are as follows:

	Regular Price Items	Sales Items
Scanned price was too low	15	8
Scanned price was too high	10	28
Scanned price was correct	152	187

Using a significance level of 0.05, carry out a contingency table analysis to test whether there is a relationship between scanning error rates and regular/sales price items.

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