CR7.20 ● The paper “The Load-Life Relationship for M50 Bearings with Silicon Nitride Ceramic Balls” (Lubrication Engineering [1984]: 153–159) reported the accompanying data on bearing load life (in millions of revolutions). The corresponding normal scores are also given.

x Normal Score x Normal Score 47.1 21.867 240.0 0.062 68.1 21.408 240.0 0.187 68.1 21.131 278.0 0.315 90.8 20.921 278.0 0.448 103.6 20.745 289.0 0.590 106.0 20.590 289.0 0.745 115.0 20.448 367.0 0.921 126.0 20.315 385.9 1.131 146.6 20.187 392.0 1.408 229.0 20.062 395.0 1.867 Construct a normal probability plot. Is it plausible that loadbearing life is a normal distribution?