Question

1) A) If a relationship has a weak, positive, linear correlation, the correlation coefficient that would be appropriate is

a) 0.2

c)0.6

b) 0.5

d)0.8

B) Residuals are the

a). horizontal deviations from the line of best fit to each data point

b). perpendicular distances from the line of best fit to each data point

c). vertical deviations from the line of best fit to each data point

d). areas of the squares between the line of best fit and each data point

C)A researcher found that sales of televisions and lawn fertilizer have been increasing over the past 12 years. The sales had a strong positive linear correlation, but no evidence could be found to support a cause-and-effect relationship. Rather, this would have been purely coincidental. This is an example of

a). a cause-and-effect relationship

b). a reverse cause-and-effect relationship

c). a presumed cause-and-effect relationship

d). an accidental cause-and-effect relationship

Answer 1

1 A) A weak linear positive correlation is denoted by:-

a)0.2

B) Residuals are:-

c) vertical deviations from the line of best fit to each data point.

C) A researcher found that sales of televisions and lawn fertilizer have been increasing over the past 12 years. The sales had a strong positive linear correlation, but no evidence could be found to support a cause-and-effect relationship. Rather, this would have been purely coincidental. This is an example of

d). an accidental cause-and-effect relationship