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To test whether the mean values at two different time points.

The amount of income spent on housing is an important component of the cost of living. The total costs of housing for homeowners might include mortgage payments, property taxes, and utility costs (water, heat, electricity). An economist particular a sample of 20 homeowners in New England and next find outd these total housing costs as a percent of monthly income, five years ago and now. The information is reported below. Is it reasonable to conclude the percent is less now than five years ago?

 

Homeowner

Five Years Ago

Now

 

Homeowner

Five Years Ago

Now

1

17%

10%

11

35%

32%


2

20

39

12

16

32


3

29

37

13

23

21


4

43

27

14

33

12


5

36

12

15

44

40


6

43

41

16

44

42


7

45

24

17

28

22


8

19

26

18

29

19


9

49

28

19

39

35


10

49

26

20

22

12


 

Statistics and Probability, Statistics

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