Sure, 67-91 or whatever would be fine as a range of x. But some students had x go from 0 to 100, or didn’t display a range at all. That’s a problem.

]]>As long as most of the density is concentrated between 60-80, does the range of x really matter? That is, if I draw a line with slope 0.07 which passes through (79, 0.5) which quickly climbs (drops) to 1 (0), the answer should still be valid, right?

(I’ll be honest, I would have set the range of x as [67, 91] or +- one foot. I am bad at estimating :| )

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