Tonja Wants to Evaluate the Effects of a New School

Tonja wants to evaluate the effects of a new school breakfast program on student conduct and academic achievement.She cannot evaluate every student in every school in the district,so she randomly selects several schools and then collects data on all of the students in those schools.What type of sample is she using?​

A) simple random
B) stratified random
C) systematic random
D) cluster random

Correct Answer:

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