A random sample of 16 steel ingots was taken from a production line. The masses, in kilograms, of thesis ingots are given below. 24.5 24.8 28.1 27.6 33.5 32.5 31.8 30.5 24.7 23.5 22.9 25.6 29.7 26.8 28.4 29.1 Assuming that this sample came from an underlying normal population, investigate the claim that its mean exceeds 27.0kg. Conduct a hypothesis test at a 0.05 significance level (Use the 7- step process of statistical hypothesis testing