Question

introduction to statistics review
independent practice
in an experiment, 50 subjects are included based on age and gender. which element of experimental design is being implemented?
a. stratification
b. randomization
c. blinding
d. replication
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Explanation:

Stratification involves dividing the population into subgroups (strata) based on certain characteristics (like age and gender here) before sampling or conducting an experiment. Randomization is about randomly assigning subjects to treatment groups. Blinding is about hiding information from participants or researchers to avoid bias. Replication is about repeating the experiment. Since subjects are divided based on age and gender, it's stratification.

Answer:

A. stratification