Question: Consider the situation in Review Exercise 8.74. Suppose a considerable effort is conducted to tighten the variability in the system. Following the effort, a random

Consider the situation in Review Exercise 8.74. Suppose a considerable effort is conducted to “tighten” the variability in the system. Following the effort, a random sample of size 40 is taken from the new assembly line and the sample variance is s

= 0.188 ounces . Do we have strong numerical evidence that σ

has been reduced below 1.0? Consider the probability and give your conclusion.

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