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In a process that manufactures tungsten-coated silicon wafers, the target resistance for a wafer is 85...

In a process that manufactures tungsten-coated silicon wafers, the target resistance for a wafer is 85 m. In a simple random sample of 50 wafers, the sample mean resistance was 84.8 m, and the standard deviation was 0.5 m. Let μ represent the mean resistance of the wafers manufactured by this process. A quality engineer tests H_0:μ=85 versus H_1:μ≠85.

a) Find the P-value.

b) Do you believe it is plausible that the mean is on target, or are you convinced that the mean is not on target? Explain your reasoning.

Math   Statistics-And-Probability   
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