BIOSTATISTICS | ZOOL-600-601 LECTURE 1
Instructor: Dr. Waheed Ali Panhwar | University of Sindh BS Zoology — Final Year
Definition & Branches of Statistics
1. What is Statistics?
Official Definition:
Statistics is a branch of mathematics and science that deals with the collection,
organization, presentation, analysis, interpretation, and drawing of conclusions from data. It
helps researchers and decision-makers understand patterns, relationships, and trends in
numerical information.
Think of statistics as a complete journey that data goes through. Raw data goes in at one end, and
meaningful knowledge comes out at the other. The five key steps in this journey are:
• Collection — gathering raw data from the field or laboratory.
• Organization — arranging data into tables, frequency distributions, and class intervals.
• Presentation — displaying data visually through charts and graphs.
• Analysis — applying mathematical methods to find patterns and measures.
• Interpretation — drawing meaningful conclusions and making decisions from results.
Key Point: These five steps always happen in order. You cannot interpret data you have
not yet analyzed, and you cannot analyze data you have not yet organized. Statistics is a
pipeline, not a single step.
2. What is Biostatistics?
Official Definition:
Biostatistics is the branch of statistics that deals specifically with the collection, analysis,
and interpretation of data related to biology, medicine, public health, and life sciences. In
simple words, it means applying statistical methods to biological and health-related data.
As a Zoology student, biostatistics is not a separate scary subject sitting next to your real subject — it
IS your subject, just with numbers. Every piece of research you do in your career will involve
biostatistics.
Uses of Biostatistics
• Studying diseases and their spread in animal or human populations
• Analyzing clinical trials and drug effectiveness
• Public health planning and policy making
• Genetics and epidemiology research
• Environmental and ecological studies
• Studying population growth of insects or animals
• Comparing blood pressure levels across different age groups
Exam Tip: The examiner may ask you to 'give examples of biostatistics in zoology.'
Always connect your examples directly to biology — insect populations, bird surveys,
species comparison, etc.
3. Branches of Statistics
Statistics is divided into two major branches. Understanding the difference between them is one of the
most important things in this entire course — your professor will almost certainly ask you about this in
the exam.
Branch 1 — Descriptive Statistics
Instructor: Dr. Waheed Ali Panhwar | University of Sindh BS Zoology — Final Year
Definition & Branches of Statistics
1. What is Statistics?
Official Definition:
Statistics is a branch of mathematics and science that deals with the collection,
organization, presentation, analysis, interpretation, and drawing of conclusions from data. It
helps researchers and decision-makers understand patterns, relationships, and trends in
numerical information.
Think of statistics as a complete journey that data goes through. Raw data goes in at one end, and
meaningful knowledge comes out at the other. The five key steps in this journey are:
• Collection — gathering raw data from the field or laboratory.
• Organization — arranging data into tables, frequency distributions, and class intervals.
• Presentation — displaying data visually through charts and graphs.
• Analysis — applying mathematical methods to find patterns and measures.
• Interpretation — drawing meaningful conclusions and making decisions from results.
Key Point: These five steps always happen in order. You cannot interpret data you have
not yet analyzed, and you cannot analyze data you have not yet organized. Statistics is a
pipeline, not a single step.
2. What is Biostatistics?
Official Definition:
Biostatistics is the branch of statistics that deals specifically with the collection, analysis,
and interpretation of data related to biology, medicine, public health, and life sciences. In
simple words, it means applying statistical methods to biological and health-related data.
As a Zoology student, biostatistics is not a separate scary subject sitting next to your real subject — it
IS your subject, just with numbers. Every piece of research you do in your career will involve
biostatistics.
Uses of Biostatistics
• Studying diseases and their spread in animal or human populations
• Analyzing clinical trials and drug effectiveness
• Public health planning and policy making
• Genetics and epidemiology research
• Environmental and ecological studies
• Studying population growth of insects or animals
• Comparing blood pressure levels across different age groups
Exam Tip: The examiner may ask you to 'give examples of biostatistics in zoology.'
Always connect your examples directly to biology — insect populations, bird surveys,
species comparison, etc.
3. Branches of Statistics
Statistics is divided into two major branches. Understanding the difference between them is one of the
most important things in this entire course — your professor will almost certainly ask you about this in
the exam.
Branch 1 — Descriptive Statistics
