in a certain chemical process, it is very important that a particular solution that is to be used as a reactant has a ph of exactly 8.2. a method for determining ph that is available for solutions of this type is known to give measurements that are normally distributed with a mean equal to the actual ph. suppose 10 independent measurements yielded the following ph values: 8.18, 8.21, 8.17, 8.22, 8.16, 8.16, 8.17, 8.19, 8.15, 8.18