In Example 10.3, the difference between μ1 and μ2 was statistically significant, but in Ex...

In Example 10.3, the difference between μ₁ and μ₂ was statistically significant, but in Example 10.7 it was not. Why are the outcomes different?

Example 10.3

TABLE 10.3 Average total cost per month for five independent replications of two inventory policies, and the differences

Example 10.7

TABLE 10.4 The five alternative (s, S) inventory policies

TABLE 10.5 Average total cost per month for five independent replications of each of the five inventory policies, with sample means and variances