Page 17 - Basic Statistics

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Q2 lies at 12.5th observation, so that

Q2 = 86 + 0.5 (86 - 86) = 86

Q3 lies at 18.75th observation, so that

Q3 = 98 + 0.75 (100 - 98) = 99.5

Interquartile range = 99.5 – 66 = 33.5

LIF = Q1 - 3/2 (Q3 - Q1) LOF = Q1 – 3 (Q3 - Q1)

= 66 - 3/2 (33.5) = 15.75 = 66 – 3 (33.5) = -34.5

UIF = Q3 + 3/2 (Q3 - Q1) UOF = Q3 + 3 (Q3 - Q1)
= 99.5 + 3/2 (33.5) = 149.75 = 99.5 + 3 (33.5) = 200

1 23 24
VAR00001

0 100 200 300

Figure 1.10 Boxplot Diagram

~~* CHAPTER 1 PRESENTATION OF DATA *~~