The engineering department of Hari ng Kalsada, a jeepney manufacturer claims that the fuel consumption rate of one model is equal to 14 km/liter. The advertising department wants to test this claim to see if the announced figure should be higher or lower than 14 km/liter. The quality control group suggests that = 1.6 km/liter, and a sample of 50 jeepneys yields x =13.44 km/liter . Test the claim of the engineering department by using a 0.05 level of significance.A senior high school student has published figures on the number of kilowatt hours used annually by various home appliances for his research. He claimed that a blender uses an average of 46 kilowatt hours per year. If a random sample of 12 homes included in a planned study indicates that blenders use an average of 42 kilowatt hours per year with a standard deviation of 11.9 kilowatt hours, does this suggest at the 0.05 level of significance that blenders use, an average, less than 46 kilowatt hours annually? Assume the population of kilowatt hours to be normal