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There are observations for 300 and 400 these would be

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Unformatted text preview: are observations for 30.0 and 40.0. These would be in two classes which is not allowed. b) Construct a histogram using classes 0-<10, 10-<20, 20-<30, etc. so that the area of each rectangle in the histogram is identical the relative frequency of the class on which it rests. suspended solids (ppm) 0 -< 10 10 -< 20 20 -< 30 30 -< 40 40 -< 50 50 -< 60 60 -< 70 70 -< 80 80 -< 90 90 -< 100 # of observations 0 0 1 8 8 6 16 7 2 2 1 Relative Frequency 0.00 0.00 0.02 0.16 0.16 0.12 0.32 0.14 0.04 0.04 0.35 Relative Frequency 0.3 0.25 0.2 0.15 0.1 0.05 0 suspended solids (ppm) c) What proportion of the concentration observations are less than 50? rel. freq (0-<10) + rel. freq (10-<20) + rel. freq (20-<30) + rel. freq (30-<40) + rel. freq (40-<50) = 0 + 0 + 0.02 + 0.16 + 0.16 = 0.34 at least 60? rel. freq (60-<70) + rel. freq (70-<80) +...
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This note was uploaded on 01/29/2014 for the course STAT 350 taught by Professor Staff during the Fall '08 term at Purdue.

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