Page 13 - Basic Statistics

8

POLYGON MASSA BAGASI

20

15

Frekuensi 10

5

0
0 20 40 60
Massa Bagasi

Figure 1.6 Polygon of mass baggage

1.3 STEM AND LEAF DIAGRAMS

Alternatively instead of histograms, for the purpose showing the

distribution of the data is stem and leaf diagram. Stem and leaf diagram are

made directly from raw data, or without grouping the data. In the stem and leaf

diagrams, information is wasted by the tolly in each class can be avoided.
Observed values can be directly seen in the stem and leaf diagram, while

displaying the shape of data distribution

Example stem and leaf diagram of baggage mass data presented in

Figure 1.7. The diagram consists of two parts, namely stem and leaves. Then

fitted with a cumulative frequency information in the first column. Figures on
stem stating the number of 10s (numbers of 100s can also be expressed and so

on) over which full data set is distributed. Leaves states the unit or gives the

last digit. Each observation in the data set is divided into two parts, namely for

~~* CHAPTER 1 PRESENTATION OF DATA *~~