Page 14 - Basic Statistics

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a stem and a leaf. Suppose the value of 48 observation, divided into the number

4 is placed on the stem which states forties numbers, and the number 8 is placed
on the leaves which stated number eight units.

Let us focus on a stem view thirties, for example stem and leaf diagram

in Figure 1.7, which is a view on the fourth line "29 3: 012 344 579". This

presentation represents 9 observations, ie

30 31 32 33 34 34 35 37 39
Numbers thirties laid out on a stem by writing the number 3, then every unit

value written on the leaves by writing "012 344 579". While the number 29 is

written in the first column states the cumulative frequency is calculated starting

from the bottom row

Cumulative frequency attached to the front of a diagram as an
additional description of stem and leaf diagram. First of all, the cumulative

frequency is calculated starting from the top line moves to the second row, and

stopped after hitting a row or a branch that contains the median. In the raw or

branch that contains median, is written how the frequency of the stem, which
was written not cumulative frequency. Writing frequency is equipped with

brackets. Furthermore, the cumulative frequency is calculated starting from the

bottom row to row under the branch that contains the median.

5 0 : 77789
16 1 : 01222457789

(20) 2 : 00000011334556677788

29 3 : 012344579
20 4 : 0022356778999

7 5 : 0011555

Figure 1.7 Stem and leaf diagram

~~* CHAPTER 1 PRESENTATION OF DATA *~~