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Charra [1.4K]
3 years ago
8

Which example is a trait of an index fossil? Question 8 options: found in a limited time span resembles a living species found i

n a limited area a particular kind of organism
SAT
1 answer:
PSYCHO15rus [73]3 years ago
5 0

Answer:

found in a limited time span

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<h3>What is internal validity?</h3>

Internal validity  serves as the  study  which bring about the establishment of a trustworthy cause-and-effect relationship  that can be found in treatment and an outcome.

it should be noted that  Internal validity also helps to eliminate alternative explanations , hence, The technique to improve internal validity is D) Addition of a control group.

Learn more about internal validity on:

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COMPLETE QUESTOIN:

Which of the following is a technique to improve internal validity ____________?

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