Card 95 / 104: In a random sample each individual in the population has an equal chance of being selected. Selection is by chance. In a new study, however, it will be important to include 20% African Americans. What type of sampling procedure will be necessary?
A) Standard (i.e., simple) random sampling is adequate
B) Cluster sampling is called for
C) Stratifi ed sampling would be best.
D) Horizontal sampling is required.

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