Question: 14.5. The data in Table 14.4 were obtained on the distribution of depth of sapwood in telephone poles. (W. A. Shewhart, Economic Control of Quality

14.5. The data in Table 14.4 were obtained on the distribution of depth of sapwood in telephone poles. (W. A. Shewhart, Economic Control of Quality of Manufactured Products. Macmillan and Co., New York, 1932, p. 66.) Assuming that the random variable under consideration has distribution N(u, 2), obtain the ML estimates of and 2.

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