Introduction and Descriptive Statistics

Dept. Industrial & System Engineering – International University - VNU




STATISTICS FOR BUSINESS




Vu Thanh Ho

Dept. Industrial & System Engineering
1

,Dept. Industrial & System Engineering – International University - VNU



Chapter 1: Introduction and Descriptive Statistics
1. Introduction
2. Types of Data
3. Population vs Sample
4. Grouping Data and Histogram
5. Percentiles and Quartiles
6. Measures of Central Tendency
7. Measures of Variability
8. Skewness and Kurtosis
9. Mean – Standard Deviation
10. Methods of Displaying Data
11. Exploratory Data Analysis
2

,Dept. Industrial & System Engineering – International University - VNU



Introduction

Statistics: a science dealing with data, including collection, analysis,
interpretation, and presentation of data



1. Descriptive Statistics 2. Inferential Statistics
• Collect • Forecasting
• Organize • Hypothesis Testing
• Summarize • Decision Making
• Display
• Analyze

, Dept. Industrial & System Engineering – International University - VNU



Types of Data
What is Data?
Data is the collection of facts, including numbers, words, measurements,
observations.
It describe something! It measures something!
1. Qualitative: 2. Quantitative:
Descriptive Information Numerical Information
• Categorical • Measurable
• Nominal • Countable
• Non-metric • Metric

Example: Example:
• Colors • Grades
• Gender • Prices
• Nationality • Temperature