Question

What is the age distribution of promotion-sensitive shoppers? A supermarket super shopper is defined as a shopper for whom at least 70% of the items purchased were on sale or purchased with a coupon.

Answer 1

The distribution of probability is valid if sum of all the probabilities equals to 1.

Step-by-step explanation:

Age Range Midpoint Percent of super shopper

18-28 23 7%

29-39 34 44%

40-50 45 24%

51-61 56 14%

61 and over 67 11%

∑p(x) = P (x1)

The distribution of the shoppers is valid as the sum of all the probabilities equals to 1.

∑p(x) : 0.7 + 0.44 + 0.24 + 0.14 + 0.11 = 1