Question: A researcher believes that Americans will have lower life expectancies than Canadians. Age in years is compared for 10 American males and 10 Canadian Males.

American Canadian

85 82

76 86

66 85

72 76

65 83

62 71

71 66

83 72

86 65

82 62

a) What is the IV and scale of measurement?

b) What is the DV and scale of measurement?

c) How many levels are there of the IV and DV, if applicable?

d) What is the null hypothesis?

e) Are you making a one tailed or two tailed hypothesis?

f) What is the alternative hypothesis?

g) What statistical test would you use? (Note if this is incorrect-all else below will be assumed incorrect).

h) Calculate the appropriate statistic (Note if this is incorrect-all else below will be assumed incorrect).

i) Would you reject or retain the null hypothesis.

j) What type of error might you have made (Type I or Type 2).