Calculate the atomic mass for zinc given the following data for its natural isotopes: 64zn 63.929 amu 48.89 % 66zn 65.926 amu 27.81 % 67zn 66.927 amu 4.11 % 68zn 67.925 amu 18.57 % 70zn 69.925 amu 0.62 %

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.