When a researcher doesn't have the very high and very low scores ...

[kaid0807]

When a researcher doesn't have the very high and very low scores on a variable in a data set, a resulting correlation coefficient would not reflect the true strength of the relation between variables because of a problem with
 
  a. restricted range.
  b. directionality.
  c. a third variable.
  d. heterogeneous subgroups.

Question 2

If a researcher wanted to know whether certain behaviors are associated with income, he or she might be reluctant to travel of a poor part of town that has a high crime rate.
 
  As a result, the data would not include very low values of income levels and the correlation coefficient would be lower than if such data were included. The potential problem in this case is
  a. heterogeneous subgroups.
  b. nonlinear relationships.
  c. the presence of latent variables.
  d. a restrict range.

[Mollythedog]

Answer to Question 1

a

Answer to Question 2

d

[kaid0807]

Thank you!

[Mollythedog]

Happy to help