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1. Customer Satisfaction and Purchases At a large de- ent store customers were asked to rate the service and the materials pu
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from given data:

(x-x)(y-y 21.8056 54.3056 69.1389 176.9722 153.4722 5.4722 481.1667 (x-x) 0.6944 8.0278 10.0278 14.6944 17.3611 0.0278 50.833

here as test statistics falls in rejection region we can conclude at 5% level of significance that there is a significant linear relationship between Rating and amount spent,

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