Effect-size statistics enable us to compare the effects of different interventions across studies ...

Effect-size statistics enable us to compare the effects of different interventions across studies using different types of outcome measures.
 
  Indicate whether the statement is true or false

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Which of the following statements is true about the range?
 
  a. It is unaffected by outliers.
  b. It can be misleading if it is inflated by one or more aberrant outliers.
  c. It provides more information than other measures of dispersion about the amount of variability in a distribution.
  d. It refers to the middle 75 of the values in a distribution.

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A correlation of -.40 indicates that 40 percent of the variation in the dependent variable is explained.
 
  Indicate whether the statement is true or false