2. A design studio is planning on producing work desks that come with a chair whose height is adjustable. Their chair needs to be adjustable enough to accommodate the “sitting knee heights” of the 5th percentile of women and the 95th percentile of men. Males have sitting knee heights that are normally distributed with a mean of 21.4 in and a standard deviation of 1.2 in and females have sitting knee heights that are normally distributed with a mean of 19.6 in and a standard deviation of 1.1 inches. What range of knees heights do these desks and adjustable chairs need to accommodate?
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