A random sample of 4 ultrasonic humidiers of one specific brand was chosen for which the observations on maximum output of moisture (oz) in controlled chamber resulted in sample mean of 13.9 oz and sample standard deviation of 1.22 oz. A random sample of 4 ultrasonic humidiers of a second brand resulted in sample mean of 12.2 oz and sample standard deviation of 1.01 oz. Suppose that the distribution of the maximum output of moisture for both brands is normally distributed, and that variability in maximum output of moisture is the same for both brands (i.e. σ1 = σ2). Employ the ve-step format to test whether there is different in mean maximum output of moisture between the brands.