In a study assessing the relationship between the number of close friends who drink alcohol ...

In a study assessing the relationship between the number of close friends who drink alcohol regularly and the number of times a person in treatment for alcohol abuse drank alcohol after completing treatment, the appropriate correlation coefficient to calculate is:
 
  a. Pearson's r
  b. Spearman's rho
  c. phi
  d. eta

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When a scatterplot is clearly curvilinear:
 
  a. The calculated correlation coefficient for all the data in the scatterplot may be low.
  b. The calculated correlation coefficient for all the data in the scatterplot will be significant.
  c. As one variable goes up, the other consistently goes down.
  d. None of these.

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A correlation of +.95:
 
  a. Is stronger than a correlation of -.95.
  b. Signifies an important relationship between two different variables.
  c. Both of the above.
  d. None of these.