Suppose that the compression-strength observations on the fourth type of box in Example 10.1 had been 655.1,

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Suppose that the compression-strength observations on the fourth type of box in Example 10.1 had been 655.1, 748.7, 662.4, 679.0, 706.9, nd 640.0 (obtained by dding 120 to each previous x4j). Assuming no change in the remaining observations, carry out n F test with = .05?
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