An interior automotive supplier places several electrical wires in a harness. A pull test measures the force required to pull spliced wires apart. A customer requires that each wire that is spliced into the harness withstand a pull force of 20 pounds. Let X equal the pull force required to pull a spliced wire apart. The following data give the values of a random sample of n = 20 observations of X:
(a) Construct a q–q plot, using the ordered array and the corresponding quantiles of N(0, 1).
(b) Does X appear to have a normal distribution?

  • CreatedOctober 12, 2015
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