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Anit [1.1K]
3 years ago
8

If we choose participants in such a way that our groups are not equal before the experiment, we have which of the following thre

ats to internal validity?
A. Selection
B. History
C. Testing
D. Maturation
Social Studies
1 answer:
BigorU [14]3 years ago
4 0

Answer:

A

Explanation:

Since your selection was poor, that is what is threatening the final results.

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