Question: In a time and motion study it was found that a senior high school module can be finished at an average time of 40 minutes

In a time and motion study it was found that a senior high school module can be finished at an average time of 40 minutes with an average deviation of 8 minutes. A group of 25 students studied the module then found to average only 35 minutes to completion. Can we conclude that the teacher's online interventions helped speed up the learning of students? Test this at 0.01 level of significance.

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