INTRODUCTION TO BIOSTATISTICS

Improve the health of individual & community

Ultimate Objective:

• Mathematical statistics

• Applied statistics

2 DIVISION OF STATISTICS

• Weather forecasts

• Emergency preparedness

2 EXAMPLE OF APPLIED STATISTIC

• descriptive statistics

• inferential statistics

BRANCHES OF STATISTICS

• Parametric statistics

• Nonparametric statistics

2 CLASSIFICATION OF STATISTICS

• t-tests

• novas

Parametric statistics examples

• Chi-square

• Biserial

Nonparametric statistics examples

• Interpret research studies

• Evaluate statistics used every day

• Presentation of data to audiences

• Illustrate central tendency and variability

• Formulate and test hypothesis

• Generalize

6 Uses of Statistics in Health Sciences

• Nominal level of measurement

• Ordinal level of measurement

• Interval level of measurement

• Ratio level of measurement

4 levels of measurement

• Response variable

• Explanatory variable

2 types of variables

• Qualitative variable

• Quantitative variable

2 CLASSIFICATION OF VARIABLES

• Discrete variable

• Continuous variable

2 DIVISION OF QUANTITATIVE VARIABLES

• Internal data

• External data

• Statistical data

• Nonstatistical data

4 CLASSIFICATION OF DATA

• Primary source

• Secondary source

2 SOURCES OF DATA

• Mailed questionnaire

• Interview

• Observation

• Telephone interview

4 METHODS OF DATA COLLECTION

• Structured interview

• Semi-structured interview

• Unstructured interview

3 types of interview