SOLUTION: PLEASE i need your help ok im going to try to put it up that way again Consider the accompanying contingency table, which presents the results of an advertising survey about

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Question 697006: PLEASE i need your help
ok im going to try to put it up that way again
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 0-4 5-9 10-14 15-19 >20 sum
Cash 150 100 25 0 0 275
Oil-Company Card 50 35 115 80 70 350
National or Bank Credit Card 50 60 65 45 5 225
Sum 250 195 205 125 75 850
a. How many customers were surveyed?
b. Why are these bivariate data? What type of variable is each one?
c. How many customers preferred to use an oil-company credit card?
d. How many customers made 20 or more purchases last year?
i tried to put a cell in here and it wouldnt let me so this is the best i could do thanks
Found 2 solutions by lynnlo, MathTherapy:
Answer by lynnlo(4176) About Me  (Show Source):
You can put this solution on YOUR website!
A=======3525
B======X AND Y
C=====1035
D=====2843

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

PLEASE i need your help
ok im going to try to put it up that way again
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 0-4 5-9 10-14 15-19 >20 sum
Cash 150 100 25 0 0 275
Oil-Company Card 50 35 115 80 70 350
National or Bank Credit Card 50 60 65 45 5 225
Sum 250 195 205 125 75 850
a. How many customers were surveyed?
b. Why are these bivariate data? What type of variable is each one?
c. How many customers preferred to use an oil-company credit card?
d. How many customers made 20 or more purchases last year?
i tried to put a cell in here and it wouldnt let me so this is the best i could do thanks

a) 850
b) Because there are 850 customers (independent variable), and their individual method of payment (dependent variable).
c) 350
d) 75