I could sure use some help with the following problem; If I can prove that the p

Question

   I could sure use some help with the following problem; If I can prove that the proportion of Maytag washersneeding repair within one year of purchase is smaller than that forGE washers, then I will buy a Maytag washer. A sample of 125 Maytagwashers gave 8 need repair within one year, a sample of 85 GEwashers gave 12 that needed repair within a year. A. Describe type I and II errors in terms of thisproblem.   B. Give the formula for the appropriate teststatistic and describe how you would calculate any unknownquantities in the formula. I thank you for any help you can provide. bigd    I could sure use some help with the following problem; If I can prove that the proportion of Maytag washersneeding repair within one year of purchase is smaller than that forGE washers, then I will buy a Maytag washer. A sample of 125 Maytagwashers gave 8 need repair within one year, a sample of 85 GEwashers gave 12 that needed repair within a year. A. Describe type I and II errors in terms of thisproblem.   B. Give the formula for the appropriate teststatistic and describe how you would calculate any unknownquantities in the formula. I thank you for any help you can provide. bigd I could sure use some help with the following problem; If I can prove that the proportion of Maytag washersneeding repair within one year of purchase is smaller than that forGE washers, then I will buy a Maytag washer. A sample of 125 Maytagwashers gave 8 need repair within one year, a sample of 85 GEwashers gave 12 that needed repair within a year. A. Describe type I and II errors in terms of thisproblem.   B. Give the formula for the appropriate teststatistic and describe how you would calculate any unknownquantities in the formula. I thank you for any help you can provide. bigd

Explanation / Answer

Z=((phat1-phat2)-(P1-P2)) SE
SE=square root of((phatxqhat) n1 +(phatxqhat) n2) phat1=8125 n1=125 phat2=1285 n2=85 P1-P2=0, this is always true phat=(8+12) (125+85) qhat=1-phat

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