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A sample of 20 paired observations generates the following data

A sample of 20 paired observations generates the following data: = 1.3 and sD2 = 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.

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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