Question

#1. To determine whether the pipe welds in a nuclear power plant meet specifications a random sample of welds is selected, and tests conducted on each. Weld strength is measured as the force required to break the weld. Suppose the specifications state that mean strength of welds should exceed 100lb/in"; the inspection team decides to test H: = 100 versus H : > 100. Why is this better than He: u < 100 ? Beccuese if its under Ho M=100 Hail> 100 100 they are most likely going to never break and hypothesis isn't valid.

Answer 1

Answer, The claim is to determine whether the pipe welds in a wuclear power plant meet specifications of hot The hull and alternative hypotheses is framed as follows: Ho: M=100 versus HaiM>100 The specification state that mean strength of welds should exceed 100 tblin? That is 43100 ... The compliment of this would be meloo. As the equality is in the hull hypothesis is Cansidered to be Ho: M=100. Generally, the alternative hypothesis represents the claim . Alternative hypothesis is considered to be usloo (claim included in null cannot be considered The less than symbol in is hypothesis, Therefore, M 4100 for alternative hypothesis.