6.7

a. Estimate whether the following pairs of scores for X and Y reflect a positive relationship, a negative relationship, or no relationship. Hint NOTE any tendency for pairs of X and Y scores to occupy similar or dissimilar relatives locations.

X Y b. Construct a scatterplot for X and Y verify that the scatterplot

64 66 does not describe a pronounced curvilinear trend.

40 79

30 98 c. Calculate r using the computation formula.

71 65

55 76

31 83

61 68

42 80

57 72