A supermarket reviews sales receipts to see if contain types of items are brough

Question

A supermarket reviews sales receipts to see if contain types of items are brought together. The study may affect the floor plan used to merchandise. For this question, label a purchase type A if it included snack foods, and label it type B if it included cleaning supplies. Suppose that, out of 855 receipts. 273 purchase were type A. 639 purchase were type B, and 206 were of both types A and B. What is the sample net for this study? What is the sample size? How many type A purchase were not of type B? How many type B purchases were not of type A? How many purchases were either of type A, or of type B or on both types)? What, to the nearest tenth of a percent, the relative frequency type B purchases? What, to the nearest tenth of a percent, the relative frequency purchases that were of neither type?

Explanation / Answer

Solution:-

A) Sample set for the study is sales reciept of supermarket.

B) Sample size is 855 reciepts.

C) N(A - B) = 67

N(A) = 273

N(B) = 639

N(A and B) = 206

N(A - B) = N(A) - N(A and B)

N(A - B) = 273 - 206

N(A - B) = 67

D) N(B - A) = 433

N(A) = 273

N(B) = 639

N(A and B) = 206

N(B - A) = N(B) - N(A and B)

N(B - A) = 639 - 206

N(B - A) = 433

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