Washers used in a certain application are supposed to have a thickness of 2 millimeters A quality control engineer measures the thicknesses for a sample of washers and tests H 0 2 versus H 1 2 c This test uses a two tailed alternate hypothesis Explain why a two tailed hypothesis is more appropriate than a one tailed hypothesis in this situation

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Question: Washers used in a certain application are supposed to have a thickness of 2 millimeters. A quality control engineer measures the thicknesses for a sample

Washers used in a certain application are supposed to have a thickness of 2 millimeters. A quality control engineer measures the thicknesses for a sample of washers and tests H₀: = 2 versus H₁: 2.

This test uses a two-tailed alternate hypothesis. Explain why a two-tailed hypothesis is more appropriate than a one-tailed hypothesis in this situation.

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