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Chapter 4: Continuous Random Variables and Probability Distributions89. The pattern in the plot (below, generated by Minitab) is quite linear. Itis very plausible that strength is normally distributed.Normal Probability PlotProbability.999.99.95.80.50.20.05.01.001Average: 134.902StDev: 4.54186N: 153125135strength145Anderson-Darling Normality TestA-Squared: 1.065P-Value: 0.00890. We use the data (table below) to create the desired plot.ordered absolutevalues (w's)zvaluesprobabilities0.89 0.525 0.0631.15 0.575 0.191.27 0.625 0.321.44 0.675 0.4542.34 0.725 0.63.78 0.775 0.7553.96 0.825 0.93512.38 0.875 1.1530.84 0.925 1.4443.4 0.975 1.962z values1005101520wi25303516140This half-normal plot reveals some extreme values, without which the distribution may appearto be normal.45

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