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The proportions of defective parts produced by two machines were compared, and the following data were...

The proportions of defective parts produced by two machines were compared, and the following data were collected. Determine a 90% confidence interval for p1 - p2. (Give your answers correct to three decimal places.)

Machine 1: n = 149; number of defective parts = 15
Machine 2: n = 145; number of defective parts = 6
Lower Limit
Upper Limit



You may need to use the appropriate table in Appendix B to answer this question.

math   Statistics-And-Probability   
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