The range takes all of a variable's values into account. (True or false?)

The range takes all of a variable's values into account.
 
  Indicate whether the statement is true or false

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Which of the following statements is true about selecting and implementing interventions supported by research evidence?
 
  a. The best scientific evidence should dictate the choice of intervention.
  b. No matter how strong an intervention's evidence might be, that intervention is likely to be inapplicable for some clients.
  c. Once the intervention is chosen and implemented, the EBP process is concluded.
  d. None of these.

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The terms variability and dispersion both refer to the extent to which the values in a distribution are clustered near to each other or are scattered away from each other.
 
  Indicate whether the statement is true or false