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An interior automotive supplier places several electrical wires in a harness. A pull
Chapter 6, Problem 6.3-14(choose chapter or problem)
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: 28.8 24.4 30.1 25.6 26.4 23.9 22.1 22.5 27.6 28.1 20.8 27.7 24.4 25.1 24.6 26.3 28.2 22.2 26.3 24.4 (a) Construct a qq plot, using the ordered array and the corresponding quantiles of N(0, 1). (b) Does X appear to have a normal distribution?
Questions & Answers
QUESTION:
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: 28.8 24.4 30.1 25.6 26.4 23.9 22.1 22.5 27.6 28.1 20.8 27.7 24.4 25.1 24.6 26.3 28.2 22.2 26.3 24.4 (a) Construct a qq plot, using the ordered array and the corresponding quantiles of N(0, 1). (b) Does X appear to have a normal distribution?
ANSWER:Step 1 of 3
(a)
The QQ plot corresponding to standard normal curve are constructed using excel in following steps:
Step 1) Arrange the data in an ascending order (column-wise manner).