When observations are made before and after the exposure to the factor, it is
Correct Answer: Paired T-test
Description: Ans. is 'c' i.e., Paired T-test o Paired T - test : is applied to paired data when each individual gives a pair of observation, such as when observations are made both before and after the play of a factor. e.g. Pulse rate before and after administration of a drug.
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