1) Which one of the following most likely describes a positive relationship? a)
ID: 3134796 • Letter: 1
Question
1) Which one of the following most likely describes a positive relationship?
a) automobile weight and gas mileage
b) test score and time to complete test
c) current age and remaining years of life expectancy
d) years of education and lifetime earnings
2) Scatterplots
a) depict relationships as dot clusters.
b) provide a preview of the fully measured relationship.
c) show any pronounced curvilinearity.
d) all of the above
3) A dot cluster that tilts from upper left to lower right reflects
a) little or no relationship.
b) a positive relationship.
c) a negative relationship.
d) a curvilinear relationship.
4) For the relationship between caloric intake and weight gain, the dot cluster should show
a) a tilt from the lower left to the upper right.
b) a tilt from the upper left to the lower right.
c) little or no tilt.
d) any of the above, depending on circumstances.
5) Given that the relationship between GPA and IQ is stronger in high school than in college, the dot cluster for high school (compared to that for college) should
a) less closely approximate a straight line.
b) more closely approximate a straight line.
c) define a straight line.
d) lack any apparent tilt
6) Which one of the following numbers couldn't possibly be a value of r?
a) 0.00
b) 1.00
c) 1.00
d) 1.03
7) You're told that, for a large group of students, an r of .23 describes the relationship between anxiety score and time to complete a problemsolving task. This implies that there probably is
a) a slight tendency for more anxious students to be slower problem solvers.
b) a slight tendency for more anxious students to be faster problem solvers.
c) little or no relationship between anxiety and speed of problem solving.
d) a very strong relationship between anxiety and speed of problem solving.
8) Although there are exceptions, a value of r in excess of .50, in either a positive or negative direction, would represent
a) an unimportant relationship in most areas of behavioral research.
b) a weak relationship in most areas of behavioral research.
c) a very strong relationship in most areas of behavioral research.
d) a virtually perfect relationship in most areas of behavioral research.
9) Assume that r equals -.43 for the relationship between years of heavy smoking and life expectancy. This signifies that
a) heavy smokers tend to have longer life expectancies.
b) heavy smokers tend to have shorter life expectancies.
c) there is a causeeffect relationship between heavy smoking and life expectancy.
d) there is a negative causeeffect relationship between heavy smoking and life expectancy
Explanation / Answer
1) b) test score and time to complete test.
2) Scatterplots a) depict relationships as dot clusters.
3) A dot cluster that tilts from upper left to lower right reflects a negtive relationship.
4) For the relationship between caloric intake and weight gain, the dot cluster should show
a) a tilt from the lower left to the upper right.
6) d) 1.03. because r lies between -1 to +1.
9) Assume that r equals -.43 for the relationship between years of heavy smoking and life expectancy. This signifies that there is a negative causeeffect relationship between heavy smoking and life expectancy.
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