answer the quiz in the image

b. A flight academy has a graduation rate of 83.5 among all their 34-year old candidates from the last eight years. What percentage of flight academies have a lower graduation rate for 34-year old candidates? - Mean Graduation Rate for 34-year-olds (Mean) = 83.1 - Standard Deviation for 34-year-olds (SD) = 1.3 - Graduation Rate at the specific flight academy (X) = 83.5 Calculate the Z-score: Z = (X - Mean) / SD Z = (83.5 - 83.1) / 1.3 Z = 0.3077 By looking up this Z-score in the Z-table the percentage of flight academies with a lower graduation rate is 64 percent