Question: To test if a training program has resulted in a significant difference in the average performance level of the workers, it is better to take

To test if a training program has resulted in a significant difference in the average performance level of the workers, it is better to take two sets of independent samples: one from the group of workers who took the training and the other from the group of workers that did not take the training program.

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To test if a training program has resulted in a significant

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