Fundamentals of Probability and Statistics for Engineers

observed and computed urinary digitoxin excretion in micrograms per day

is given in Figure 8.7 (n 100) (s ource: Jelliffe et al., 1970).

(l) X is the live load in pounds per square feet (p sf) in warehouses. The

histogram in Figure 8.8 represents 220 measurements of live loads on

different floors of a warehouse over bays of areas of approximately 400

square feet (source: Dunham,1952).

40

30

20

10

0

2250 2500 2750 3000 3250

Peak combustion pressure (kPa)

Number of observations

Figure 8.4 Histogram for Problem 8.2(h) (source: Chen and Krieger,1976)

10

20

30

40

50

40 80 120 160 200 240 280

Percentage of drivers in group

Annual premium ($)

0

Low-risk drivers

Medium-risk drivers

High-risk drivers

Figure 8.5 Frequency diagrams for Problem 8.2(i) (source: Ferreira,1974)

256 Fundamentals of Probability and Statistics for Engineers

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