Table below refers to a sample of subjects randomly selected for an Italian study on the relation between income an whether one possesses a travel credit card (such as American Express or Diners Club). At each level of annual income in millions of lira, the table indicate the number of subjects sampled and the number of them possessing at least one travel credit card. Analyze these data.

Hint: the main research question is whether one possesses a travel credit card or not. Also, you have to figure out what the independent variable in this case.

Another Hint: when figuring out the independent variable keep in mind that this will be a logistic regression and so the dependent variable should be a binomial variable.

Observation:

Income:

24

27

28

29

30

31

32

33

34

35

38

39

40

41

42

45

48

49

50

52

59

60

65

68

70

79

80

84

94

120

130

Number of Cases

1

1

5

3

9

5

8

1

7

1

3

2

5

2

2

1

1

1

10

1

1

5

6

3

5

1

1

1

1

6

1

Credit Cards

0

0

2

0

1

1

0

0

1

1

1

0

0

0

0

1

0

0

2

0

0

2

6

3

3

0

0

0

0

6

1