The weld strength of the welds in the cooling system is required to be greater than 175 psi. Naval engineers will measure weld strengths of randomly-selected welds made exactly like those used in the...

The weld strength of the welds in the cooling system is required to be greater than 175 psi. Naval engineers will measure weld strengths of randomly-selected welds made exactly like those used in the cooling system. They will use their measurements to test the hypothesis H0:μ⩽175 against   H1:μ > 175. If they reject their null hypothesis, what should they conclude?

Multiple choice options (pick 1):

1. The true mean strength is not less than 175 psi.

2. The true mean strength is not greater than 175 psi.

3. The true mean strength is greater than 175 psi.

4. The true mean strength is less than 175 psi.