# spss software needed data management amp epidemiologic analysis 1

1. Is blood pressure the same for both arms? Listed below are BP measurements (mm Hg) taken from the right and left arms of the same woman. Use a level of significance 5% to test for a difference between the measurements from the two arms (Hint: Paired T-TEST design).

1

2

3

4

5

Right Arm

102

101

94

79

79

Left Arm

175

169

182

146

144

2. Each of three cars is driven with each of four diï¬€erent brands of gasoline. The number of miles per gallon driven for each of the ab = (3)(4) = 12 diï¬€erent combinations is recorded below.

Gasoline

Car

1

2

3

4

1

26

28

31

31

2

24

25

28

27

3

25

25

28

26

Test the hypothesis that we can expect the same mileage for each of these four brands of gasoline at Î± = 0.01.
Test the hypothesis that we can expect the same mileage for each of these three models of car at Î± = 0.01.
Is there any evidence of interaction between gasoline brands and type of cards in determining mileage driven at Î± = 0.01?

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