3b. If the writing scores have a population standard deviation of o = 10, what conclusion should we make about the effectiveness of the new writing program? Assume a 2-tailed test with a = .05. %3D 3c. If the writing scores have a population standard deviation of o = 20, what conclusion should we make about the effectiveness of the new writing program? Assume a 2-tailed test with a = .05. %3D %3D

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