Question
Column A contains diameter measurements for 200 randomly selected pins with a nominal diameter specification of 10 mm. The Continuous Improvement analyst believes the underlying
Column A contains diameter measurements for 200 randomly selected pins with a nominal diameter specification of 10 mm. The Continuous Improvement analyst believes the underlying process is best approximated by a Weibull distribution (2-parameter). Assuming the analyst is correct in asserting the underlying process is a 2-parameter Weibull, use Minitab to estimate the shape and scale parameters of the Weibull.
Find shape parameter (alpha), scale parameter (beta), mean & sample standard deviation.
So, once you find estimates for alpha and beta, try using those values to calculate the expected value for the Weibull distribution. There is a handy integral calculator athttps://www.integral-calculator.com/. Using this method, I found an expected value of 10.0813, which is very close the average pin diameter you should calculate for part c, using the sample data.
10.12 |
10.11 |
10.12 |
10.03 |
10.1 |
9.94 |
10.09 |
10.04 |
10.01 |
10.04 |
10.03 |
10.08 |
10.04 |
10.06 |
10.12 |
10.11 |
10.07 |
10.1 |
10.08 |
10.03 |
10.08 |
10.04 |
10.04 |
10.11 |
10 |
10.12 |
10.11 |
10.08 |
10.1 |
10.1 |
10.14 |
10.1 |
10.14 |
10.01 |
10.07 |
10.1 |
10.04 |
10.11 |
10.13 |
9.97 |
10.02 |
10.07 |
10.08 |
10.11 |
10.08 |
10.07 |
10.11 |
10.12 |
10.1 |
10.08 |
10.11 |
10.11 |
10.05 |
10.04 |
10.1 |
10.04 |
10.13 |
10.09 |
10.13 |
10.07 |
10.12 |
10.12 |
10.01 |
10.13 |
10.08 |
10.08 |
10.14 |
10.07 |
10.07 |
10.12 |
10.13 |
10.13 |
10.1 |
10.08 |
10.08 |
10.05 |
10.07 |
10.08 |
10 |
10.06 |
10.13 |
10.09 |
10.06 |
10.11 |
10.11 |
10.12 |
10.1 |
10.07 |
10.07 |
10.08 |
10.06 |
10.1 |
10.09 |
10.08 |
10.06 |
10.11 |
10.09 |
10.03 |
9.92 |
10.11 |
10.08 |
10.12 |
10.08 |
10.13 |
10.1 |
10.06 |
10.12 |
10.12 |
10.12 |
10.07 |
10.16 |
10.09 |
10.11 |
10.1 |
9.98 |
10.12 |
10.06 |
10.07 |
10.08 |
10.12 |
10.05 |
10.09 |
10.08 |
10.11 |
10.15 |
10.02 |
10.07 |
10.08 |
10.11 |
10.11 |
10.08 |
10.15 |
10.12 |
10.1 |
10.09 |
10.07 |
10.09 |
10.13 |
10.06 |
9.99 |
10.09 |
10.1 |
10.06 |
10.08 |
10.15 |
10.06 |
10.07 |
10.11 |
10.08 |
10.05 |
10.07 |
10.07 |
10.11 |
10.08 |
10 |
10.04 |
10.07 |
10.04 |
10.12 |
10.11 |
10.13 |
10.1 |
10.14 |
9.99 |
10.1 |
10.15 |
10.11 |
10.01 |
10.06 |
10.12 |
10.02 |
10.13 |
10 |
10.09 |
10.07 |
10.11 |
10.06 |
10.01 |
10.14 |
10.16 |
10.08 |
10.04 |
10.08 |
10.11 |
10.09 |
10.09 |
10.11 |
10.13 |
10.09 |
10.1 |
10.04 |
10.1 |
10.11 |
10.09 |
10.11 |
10.02 |
10.13 |
10.12 |
10.1 |
10.11 |
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