Fundamentals of Probability and Statistics for Engineers

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Number of blemishes

Number of observations

1

2

3

4

5

6

7

8

10

9

Figure 8.6 Histogram for Problem 8.2(j) (source: Link,1972)

25

20

15

10

5

Number of observations

–54 –46 –38 –30 –22 –14 –6 0 6 14 22 30

Difference

Figure 8. 7 Histogram for Problem 8.2(k) (source: Je lliffe et al., 1970).

Note: the horizontal axis shows the difference between the observed and

computed urinary digitoxin excretion, in micrograms per day

Observed Data and Graphical Representation 257