2.1 The operations manager at a manufacturing plant for medium-sized vehicles has asked the quality inspection team to investigate the variation in the thickness of their brake pads (in mm). A random sample of 12 brake pads was selected, and the results are as follows: 10 15 11 13 14 12 13 14 16 11 15 12 (a) Determine the mean thickness of brake pads. (4) (b) Calculate the standard deviation of the thickness of brake pads. (4)
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Step 1: The mean is the sum of all the values divided by the number of values. Show more…
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