Before agreeing to purchase a large order of polyethylene sheaths for a particular type of high-pressure oil-filled submarine power cable, a company wants to see conclusive evidence that the true standard deviation of sheath thickness is less than 0.06 mm. what hypotheses should be tested, and why? the appropriate hypotheses are h0: σ 0.06 mm versus ha: σ 0.06 mm. with this formulation, the burden of proof is on the data to show that the requirement been met. in this context, what are the type i and type ii errors? in this context, the type i error occurs if we a shipment that should have been . a type ii error occurs if we a shipment that should have been .