3- The diameters of steel shafts produced by a certain manufacturing process should have a mean diameter of 0.255 inches

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3- The diameters of steel shafts produced by a certain manufacturing process should have a mean diameter of 0.255 inches

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3 The Diameters Of Steel Shafts Produced By A Certain Manufacturing Process Should Have A Mean Diameter Of 0 255 Inches 1
3 The Diameters Of Steel Shafts Produced By A Certain Manufacturing Process Should Have A Mean Diameter Of 0 255 Inches 1 (32.45 KiB) Viewed 75 times
3- The diameters of steel shafts produced by a certain manufacturing process should have a mean diameter of 0.255 inches. The diameter is known to follow normal distribution and have a standard deviation of a=0.0001 inch. A random sample of 12 shafts has an average diameter of 0.2545 inches. a. Set up the appropriate hypothesis on the mean . b. Which distribution should be used to test these hypotheses? Why? c. Based on following Minitab Output, what are your condition for a=0.05? Test Static P N Mean SE Mean 95%O 20 0.254500 0.000029 (0.254443,0.254557) -17.32 0.000
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