Cooling method for gas turbines. Refer to the Journal of Engineering for Gas Turbines and Power (Jan. 2005)

study of the performance of augmented gas turbine engines, presented in Exercise 8.46

(p. 420). Recall that the performance of each in a sample of 67 gas turbines was measured by heat rate (kilojoules per kilowatt per hour). Suppose that standard gas turbines have heat rates with a standard deviation of 1,500 kJ>kWh. Is there sufficient evidence to indicate that the heat rates of the augmented gas turbine engine are more variable than the heat rates of the standard gas turbine engine? Test, using a = 0.5.