Electric Motor Quality Tests A factory has ve production

Chapter 10, Problem 10.4.4

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Electric Motor Quality Tests A factory has ve production lines that assemble electric motors. A random sample of 180 motors is taken from each production line and is given a quality examination. The results are given in DS 10.4.4. (a) Is there any evidence that the pass rates are any different for the ve production lines? (b) Construct a 95% two-sided condence interval for the difference between the pass rates of production lines 1 and 2.

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