Instead of using 0.05 for identifying significant values, use the criteria that a value x is significantly high if P(x or greater) ≤ 0.025 and a value is significantly low if P(x or less) ≤ 0.025. Find the female back-to-knee length, separating significant values from those that are not significant. Using these criteria, is a female back-to-knee length of 20 in. significantly low?
Use the data in the table below for sitting adult males and females (based on anthropometric survey data from Gordon, Churchill, et al.). These data are used often in the design of different seats, including aircraft seats, train seats, theater seats, and classroom seats.
Mean St. Dev. Distribution
Males...........23.5 in...........1.1 in..................Normal
Females.........22.7 in..........1.0 in..................Normal