Statistical Table & Statistical Graph. Zhang Guozhen School of Public Health Xinjiang Medical University. Statistical Tables and Graphs. Statistical description is a kind of fundamental work for statistical inference, which describes the feature of the sample.
School of Public Health
Xinjiang Medical University
§1 Statistical Tables
Example1 125 children were tested in county B and 9 cases were found In this study, 221 children were tested in county A and 4 cases were found suffering from rachitis; the prevalence rate was 18.10 per thousand.; the prevalence rate was 72.00 per thousand. 248 children were tested in county C and 2 cases were found; the prevalence rate was 8.00 per thousand…..
Table 1 Rachiotis prevalence rates in 5 counties
and the mark “ ” usually put on the bottom of
Table 1 Table title
The mental score and other factors related to coronary heart disease were researched in certain area. The results were shown in table 5
Solution：dividing it into two tables, table 6,7
Mix of important and many non-important ones
Total and subtotals; Digits and decimals
What’s wrong with the following table? coronary heart disease
§2 coronary heart diseaseStatistical Graphs
type coronary heart disease：Different graphs according to different purposes and types of data
bar graph, histogram, percent bar chart,
pie chart, line graph, scatter plot ,statistical map, stem-leaf plot, box plot, residual plot
Basic requirements: coronary heart disease
Principle coronary heart disease
below the graph
Vertical item (unit)
Horizontal item (unit)
Fig 1 The basic structure of a statistical graph
Example 3 point of intersection commonly is 0. The ratio of Y-axis to X-axis is Mortality rates of main cause of death are shown in figure 1.
Bar chart is selected because the cause of death is interdependent indexes. Simple bar chart , only classified by the cause of death .
Figure 2 mortality rate of main cause of death (/100,000) point of intersection commonly is 0. The ratio of Y-axis to X-axis is
Fig.3 Average cost of outpatients for several treatments in a hospital in 1994 and 1997
Fig.4 treatments in a hospital in 1994 and 1997The pie chart
10% treatments in a hospital in 1994 and 1997
Fig.5 Percentages of the reasons for re-addiction (xx place,1996)
A pie chart is good for making relative comparisons among pieces of a whole.
Compare frequencies of a category variable
Fig. 6 Mother’s education manner in group of drug addicts and group of controls. (xx place, 1996)
Describe the changing of Y with X (time) -- tendency
Fig. 7 Incidence rates of stomach cancer in a city
Fig.8 example of line graph and group of controls. (xx place, 1996)
Left: The absolute difference of mortality rates ~ Year
Right: The absolute difference of log (mortality rate)
Suitable line graphs in different situation
Fig.9 Age distribution of first attack among 215 cases and group of controls. (xx place, 1996)
in the interval
Describe the relationship between two numerical variables.
Is the relationship linear or non-linear?
Fig 10 Relationship between temperature and deaths due to bronchitis and pneumonia.