A computer manufacturer has four suppliers of electrical circuit boards. Random samples of 200 circuit boards are
Question:
(a) Calculate the expected cell frequencies.
(b) Calculate the Pearson chi-square statistic X2.
(c) Calculate the likelihood ratio chi-square statistic G2.
(d) What p-values do these chi-square statistics give?
(e) Is the null hypothesis that the defective rates are identical rejected at size α = 0.05?
(f) Calculate a 95% two-sided confidence interval for the defective rate of supplier A. (g) Calculate a 95% two-sided confidence interval for the difference between the defective rates of suppliers B and C.
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a The expected cell frequencies are b The Pearson chisquare statistic i...View the full answer
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Related Book For 
Probability And Statistics For Engineers And Scientists
ISBN: 9780495107576
3rd Edition
Authors: Anthony Hayter
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