A random sample of n = 8 E-glass fiber test specimens of a certain type yielded a sample mean of interfacial shear stress of 30.5 and a sample standard deviation of 3.0. Assuming the interfacial shear yield stress is normally distributed, compute a 98% CI for the true shear stress. Round final answer to 2 decimal places (i.e., xxx). - Determine the critical value of the test statistic from the tables. - Compute the 98% CI