(Steps Shown) Axle diameters. Averages are less variable than individual observations. Suppose that the axle diameters in Exercise 5.43 vary according to a Normal


Question: Axle diameters. Averages are less variable than individual observations. Suppose that the axle diameters in Exercise 5.43 vary according to a Normal distribution. ln that case, the mean 35 of an SR8 of axles also has a Normal distribution.

  1. Make a sketch of the Normal curve for a single axle. Add the Normal curve for the mean of an SRS of 4 axles on the same sketch.
  2. What is the probability that the diameter of a single randomly chosen axle differs from the target value by 0.006 mm or more?
  3. What is the probability that the mean. diameter of an SR8 of 4 axles differs from the target value by 0.006 mm or more?

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