Question

• Make Excel do all of the necessary calculations
• Report answers on the worksheet
• Label answers as the questions are labelled: a, b, c,…
• Use the probability notation p(A), p(Aand B),… etc
• Submit your spreadsheet in Blackboard Assignment.

1. The owner of a family style restaurant in downtown Pittsburgh was interested in studying customer entrée and dessert orders. Records were maintained for a weekend time period: results in the table below.

	Ordered Beef Entree
Ordered Dessert	Yes	No	Total
Yes	71	65
No	116	348
Total

a. What is the probability that a randomly selected customer ordered dessert?

b. What is the probability that a randomly selected customer did not order beef?

c. What is the probability that a randomly selected customer did not order beef and did not order dessert?

d. What is the probability that a randomly selected customer did order beef and did not order dessert?

e. What is the probability that a randomly selected customer did not order beef or did not order dessert??

f.   n/a

g. We know that customer X ordered beef, what is the probability that he ordered dessert?

h. We know that customer Y ordered dessert, what is the probability that she ordered beef?

i. Are the events Ordered Dessert and Ordered Beef independent? Show the test.

Answer 1

the table below.

	Ordered Beef Entree
Ordered Dessert	Yes	No	Total
Yes	71	65	136
No	116	348	464
Total	187	413	600