STATISTICS FINAL ACTUAL EXAM TESTED
QUESTIONS AND VERIFIED ANSWERS
◉ Which Pearson correlation shows the greatest strength or
consistency of a relationship?
Answer: -0.90
◉ The results of a study indicate that adolescents who watch
more violent content also tend to engage in more violent behavior
than their peers. The correlation between the amount of TV
violent content and amount of violent behavior is__________.
Answer: positive correlation
◉ A researcher records the odometer reading and price for a
group of used Hondas. What kind of correlation is likely to be
obtained for these two variables?
Answer: negative correlation
◉ What is the SP for the following data?
XY
14
24
91
, Answer: -15
◉ Which of the following best describes the Pearson Correlation
for these data?
xy
25
51
34
42
Answer: negative
◉ Suppose the correlation between weight and height for adults
is +0.40. What proportion (or percent) of the variability in weight
can be explained by the relationship in height?
Answer: 16%
◉ A set of n=15 pairs of scores (x and y values) produces a
correlation of r=.40. If each of the x values is multiplied by 2 and
the correlation is computed for the new scores, what value will be
obtained for the new correlation?
Answer: r= .40
◉ For the linear equation y= 2x+4, if X increases by one point,
how much will y increase?
Answer: 2 points
QUESTIONS AND VERIFIED ANSWERS
◉ Which Pearson correlation shows the greatest strength or
consistency of a relationship?
Answer: -0.90
◉ The results of a study indicate that adolescents who watch
more violent content also tend to engage in more violent behavior
than their peers. The correlation between the amount of TV
violent content and amount of violent behavior is__________.
Answer: positive correlation
◉ A researcher records the odometer reading and price for a
group of used Hondas. What kind of correlation is likely to be
obtained for these two variables?
Answer: negative correlation
◉ What is the SP for the following data?
XY
14
24
91
, Answer: -15
◉ Which of the following best describes the Pearson Correlation
for these data?
xy
25
51
34
42
Answer: negative
◉ Suppose the correlation between weight and height for adults
is +0.40. What proportion (or percent) of the variability in weight
can be explained by the relationship in height?
Answer: 16%
◉ A set of n=15 pairs of scores (x and y values) produces a
correlation of r=.40. If each of the x values is multiplied by 2 and
the correlation is computed for the new scores, what value will be
obtained for the new correlation?
Answer: r= .40
◉ For the linear equation y= 2x+4, if X increases by one point,
how much will y increase?
Answer: 2 points
