A sample of 20 paired observation generates the following


Question: A sample of 20 paired observation generates the following data d = 1.3 and S2D = 2.6. Assume a normal distribution.

a. Construct a 90% confidence interval for the mean difference μD.

b. Using the confidence interval, test whether the mean difference differs from zero. Explain.

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Basic Statistics: A sample of 20 paired observation generates the following
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