To determine whether the pipe welds in a nuclear power plant meet specifications, a random sample of welds is selected and tests are conducted on each weld in the sample. Weld strength is measured as the force required to break the weld. Suppose that the specifications state that the mean strength of welds should exceed 100 lb/in2. The inspection team decides to test H0: µ = 100 versus Ha: µ > 100. Explain why this alternative hypothesis was chosen rather than µ <100.