Costco is a warehouse store that requires its customers to have a membership to purchase items. Costcooffers nonbusiness customers two types of membership. Gold Star members pay an annual fee of $50,whereas Executive members pay a $100 annual fee but also earn a 2% reward on most Costco pur-chases. The following contingency table shows the number of customers who had check-out totals aboveand below $200 along with their corresponding membership type.MembershipCheck-Out TotalGoldExecutive$200 or less6621More than $2001548Set up a contingency table similar to that in Figure 4.8 showing the following:a. marginal probabilities,b. joint probabilities, andc. conditional probabilities.d. Display these probabilities in a decision tree using check-outtotal as the starting branches.e. What conclusions can be made concerning the spendingpatterns of each membership type?Answers can be found on page 196.

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Costco is a warehouse store that requires its customers to have a membership to purchase items. Costco offers nonbusiness customers two types of membership. Gold Star members pay an annual fee of $50, whereas Executive members pay a $100 annual fee but also earn a 2% reward on most Costco pur- chases. The following contingency table shows the number of customers who had check-out totals above and below $200 along with their corresponding membership type. Membership

Costco is a warehouse store that requires its customers to have a membership to purchase items. Costco offers nonbusiness customers two types of membership. Gold Star members pay an annual fee of $50, whereas Executive members pay a $100 annual fee but also earn a 2% reward on most Costco pur- chases. The following contingency table shows the number of customers who had check-out totals above and below $200 along with their corresponding membership type. Membership

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Question

Costco is a warehouse store that requires its customers to have a membership to purchase items. Costco
offers nonbusiness customers two types of membership. Gold Star members pay an annual fee of $50,
whereas Executive members pay a $100 annual fee but also earn a 2% reward on most Costco pur-
chases. The following contingency table shows the number of customers who had check-out totals above
and below $200 along with their corresponding membership type.
Membership
Check-Out Total
Gold
Executive
$200 or less
66
21
More than $200
15
48
Set up a contingency table similar to that in Figure 4.8 showing the following:
a. marginal probabilities,
b. joint probabilities, and
c. conditional probabilities.
d. Display these probabilities in a decision tree using check-out
total as the starting branches.
e. What conclusions can be made concerning the spending
patterns of each membership type?
Answers can be found on page 196.

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