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Hypothesis Testing of Mean: Treatment Effect

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Givens: A sample of n = 9 that receives the treatment, a population mean m = 40, a standard deviation s = 9, and an after treatment sample mean of M = 33.

Is the data sufficient to conclude that the treatment has a significant effect using a two-tailed test with alpha = .05, and later, if the standard deviation is changed to s = 15 is there a significant treatment effect using a two-tailed test at the alpha level of .05?

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The solution provides step by step method for the calculation of testing of hypothesis. Formula for the calculation and Interpretations of the results are also included. Interactive excel sheet is included. The user can edit the inputs and obtain the complete results for a new set of data.

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