Designing a Work Station A common design requirement is that an environment must fit the range of

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Designing a Work Station A common design requirement is that an environment must fit the range of people who fall between the 5th percentile for women and the 95th percentile for men. In designing an assembly work table, we must consider sitting knee height, which is the distance from the bottom of the feet to the top of the knee. Males have sitting knee heights that are normallly distributed with a mean of 21.4 in. and a standard deviation of 1.2 in.;

females have sitting knee heights that are normally distributed with a mean of 19.6 in. and a standard deviation of 1.1 in. (based on data from the Department of Transportation).

a. What is the minimum table clearance required to satisfy the requirement of fitting 95% of men? Why is the 5th percentile for women ignored in this case?

b. The author is writing this exercise at a table with a clearance of 23.5 in. above the floor.

What percentage of men fit this table, and what percentage of women fit this table? Does the table appear to be made to fit almost everyone?

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