Consider the accompanying contingency table, which presents the results of an ad

Question

Consider the accompanying contingency table, which presents the results of an advertising survey about the use of credit by Martan Oil Company customers. Number of Purchases at Gasoline Station Last Year Preferred Method of Payment Cash Oil Company National or Bank Credit Card Sum 10 14 25 115 65 205 15 19 20 Sum 275 350 225 850 0-4 5 9 150 100 80 45 125 70 50 50 250 35 60 195 Card 75 (a) How many customers were surveyed? (b) Why are these bivariate data? What type of variable is each one? O These are bivariate data because there are two variables, preferred method of payment and number of purchases. Both of these variables are quantitative. O These are bivariate data because there are two variables, preferred method of payment and number of purchases. Both of these variables are qualitative. O These are bivariate data because there are two variables, preferred method of payment and number of purchases. Preferred method of payment is qualitative, and number of purchases is quantitative. O These are bivariate data because there are two variables, preferred method of payment and number of purchases. Preferred method of payment is quantitative, and number of purchases is qualitative. (c) How many customers preferred to use an oil company credit card? (d) How many customers made 20 or more purchases last year? (e) How many customers preferred to use an oil company credit card and made between five and nine purchases last year? (t) What does the 80 in the fourth cell in the second row mean? 80 customers who made between 15 and 19 purchases preferred to use the oil company card. 80 customers who made between 10 and 14 purchases preferred to use the oil company card. 80 customers who made between 15 and 19 purchases preferred to use cash. 80 customers who made between 10 and 14 purchases preferred to use cash.

Explanation / Answer

a. Number of customers surveyed = 850

b. Option 3 is the correct answer, preferred method of payment is qualitative and number of purchases is quantitative.

c. Sum of oil company cards = 350

d. No of people with 5-9 purchases and oil company card = 35

e. Option 1 - 80 people chose to pay with oil company card and made 15-19 purchases.

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