Multiple Choice
A researcher was interested in the effect of a literature curriculum on children's reading abilities. He put the students with high English grades in the group to receive the curriculum and the children with lower grades in the group that will not receive the curriculum. This design has problems with:
A) random sampling.
B) reliability.
C) random assignment.
D) negative correlations.
Correct Answer:

Verified
Correct Answer:
Verified
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