Research should be designed to _________ for nuisance and extraneous variables.

Research should be designed to _________ for nuisance and extraneous variables.
 
  a. ignore
  b. control
  c. manipulate
  d. review

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Studies conducted at most universities that use General Psychology students employ which nonprobability sampling procedure?
 
  a. simple
  b. convenience
  c. quota
  d. cluster

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The independent variable is the variable being measured.
 
  Indicate whether the statement is true or false

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For her study, Stephanie has stated her research hypothesis as : H1 1 > 2 . What do the symbols mean?
 
  a. The mean of population 1 is equal to the mean of population 2
  b. The mean of population 1 is greater than the mean of population 2
  c. The mean of population 1 is less than the mean of population 2
  d. The mean of population 1 is not equal to the mean of population 2

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When a researcher classifies data into an order or rank of magnitude, the researcher is using a(n) scale.
 
  a. ordinal
  b. nominal
  c. ratio
  d. interval