21) Ball bearings are manufactured with a mean diameter of 9.00 mm, and a standard deviation of 0.03 mm. The diameters are normally distributed. Answer the following questions. Always draw the curve and label it correctly. Write the full calculator command you used: a) (6 pts) What percent of diameters are less than 9.05 mm? b) (5 pts) What is the probability that one randomly chosen diameter is between 8.96 and 9.06 mm? c) (5 pts) Find the ball bearing diameter that is at the 15th percentile.
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