Hypothesis Testing:
Is it reasonable to conclude that both machines produce the same fraction of defective parts, using the significance 0.05? If this analysis done by hand . Sample sizes are large enough to satisfy the assumptions and it is a two-tailed test. =0.0383 where =0.05 and =0.0267. Test statistics: =1.49 (i) Reject H0 if z ( -z(/2=-1.96 or z ( z(/2 =1.96. ................
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