The chemical supplier certifies the sulfite content of the sample to be 51.64 wt% . Which case describes how an instructor would determine if the two results differ at a given confidence level? Case 1: Replicate measurements of a sample made by a single technique are compared with an accepted value. Case 2: Either compare replicate measurements of one sample made by two analytic techniques, or compare samples created from two synthesis techniques measured by one analytic technique. Case 3: Multiple samples are measured by two different techniques and the results are compared.