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Hypothesis testing problem for mean

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The experimental group has mean of 38, control group has mean of 35.

The standard deviations are 3 and 5, respectively.

At the 5% level, what is the conclusion?

The 20 in the experimental group had extra class time, the 30 in the control group did not.

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Step by step method for testing the hypothesis under 5 step approach is discussed in this solution.

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