Biostatistics

Statistics : It is the science & art of data collection , presentation & analysis
Biostatistics :dealing with the biological values e.g. hemoglobin ,Body temprature.
Vital Statistics : It is dealing with vital events e.g. Births , Deaths & infections.
Data :are the building blocks of statistics & refers to individual values observed or measured i.e It is numerical description of quantative aspect of information.
Functions of Statistics :
1- Presents facts in a definite form.
2- Translation of biological function in numerical figures.
3-siplifies coplex mass of data in a suitable numbers.
4-help in comparison of certain facts , by themselves may be meaningless unless compared with similar facts in other places or period.
5-Used to interpret conditions.
Variables : The biological phenpomena varies in the same individual from time to time.
Types of Variavles :
1-Quantative :are numerical based on numbers & divided into :
a- Discrete It's countable in units with no dumerical point e.g numbers of children can't be 3.5
b- Continuous : values vary between zero & certain value e.g weight 65.5
2- Qualtative :the data are expressed in fom of quality not number & divided into :
a-Ordinal , Scale or Grades e.g. short-medium-tall
b-Nominal : as Blood Groups A, B,AB,O