Question: Two types of plastic are suitable for an electronics component manufacturer to use. The breaking strength of this plastic is important. It is known that

Two types of plastic are suitable for an electronics component manufacturer to use. The breaking strength of this plastic is important. It is known that 1 = 2 = 1.0 psi. From a random sample of size n1=30 and n2=35, you obtain 1=162.5 and 2=155.0. The company will not adopt plastic 1 unless its mean breaking strength exceeds that of plastic 2 by at least 10 psi. a) Based on the sample information, should it use plastic 1? Use = 0.05 in reaching a decision. b) Calculate a 95% confidence interval on the difference in means. What is your conclusion on the hypothesis based on this CI

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