4. Practice paired observation procedures for the following 6 samples and the differences for Company A and Company B. 2 3 4 5 Company A Company B 8.8 10.0 12.5 9.7 10.0 13.2 8.4 10.1 12.0 9.3 9.0 13 Hint: when calculating differences, include + and - Но: n= df = alpha = 5% На: He>0 mean of differences= Decision: standard deviation of differences = 0.363

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