Lectures Applied statistics for business: Chapter 1 - ThS. Nguyễn Tiến Dũng

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Lectures "Applied statistics for business - Chapter 1: Data and statistics" provides students with the knowledge: Applications in business and economics, data, data sources, descriptive Statistics, statistical Inference, computer and statistical analysis, data mining, ethical guidelines for statistical practice. Invite you to refer to the disclosures.

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Nội dung Text: Lectures Applied statistics for business: Chapter 1 - ThS. Nguyễn Tiến Dũng

Chapter 1 DATA AND STATISTICS MBA Nguyen Tien Dung School of Economics and Management Website: https://sites.google.com/site/nguyentiendungbkhn Email: dung.nguyentien3@hust.edu.vn
Main Contents 1.1 Applications in Business and Economics 1.2 Data 1.3 Data Sources 1.4 Descriptive Statistics 1.5 Statistical Inference 1.6 Computer and Statistical Analysis 1.7 Data Mining 1.8 Ethical Guidelines for Statistical Practice © Nguyễn Tiến Dũng Applied Statistics for Business 2
1.1 Applications in Business and Economics ● Statistics is essential for all other sciences ● Statistics about data ● All sciences need to get, to analyse and to present data and results ● For a business ● R&D (Research & Development) ● Marketing ● Production ● Quality ● Human Resources ● Accounting ● Finance ● Information ● For economics ● Policies for developing cities, districts, provinces and nations. © Nguyễn Tiến Dũng Applied Statistics for Business 3
1.2 Data ● Elements: the entities on which data are collected. ● Variables: a characteristic of interest for the elements. ● Observations: the number of observations or the size of a sample © Nguyễn Tiến Dũng Applied Statistics for Business 4
● 60 elements, 60 observations ● 5 variables © Nguyễn Tiến Dũng Applied Statistics for Business 5
Features of Data ● Scale of Measurement ● Nominal ● Ordinal ● Interval ● Ratio ● Categorical and Quantitative Data ● Categorical: nominal, ordinal data ● Quantitative Data: interval, ratio data ● Cross-sectional and Time-series data © Nguyễn Tiến Dũng Applied Statistics for Business 6
Nominal Scale and Data ● Distinguish between items, do not rank them. ● Are you 1. Male? 2. Female? ● What is your marital status? ● 1. Single 2. Married 3. Divorced © Nguyễn Tiến Dũng Applied Statistics for Business 7
Ordinal Scale and Data ● Ranking items, do not know the distance between them. ● Are you ● 1. A junior student? ● 2. A senior student? ● What is your average monthly income? ● 1. Below USD 200 ● 2. From USD 201 – 400 ● 3. From USD 401 – 600 ● 4. From USD 601 – 800 ● 5. From USD 801 – 1000 ● 6. Above USD 1000 © Nguyễn Tiến Dũng Applied Statistics for Business 8
Interval Scale and Data ● Measures the distance between items, but does not have an absolute zero (anchor) point. ● Temperature scale: Celcius, Farenheit degree scales ● How do you feel about the Statistics course? ● Very easy 1 2 3 4 5 Very difficult ● Very unuseful 1 2 3 4 5 Very useful © Nguyễn Tiến Dũng Applied Statistics for Business 9
Ratio Scale and Data ● Interval scale + an absolute and meaningful zero point. ● Time, distance scale: hour, minute, centimetre © Nguyễn Tiến Dũng Applied Statistics for Business 10
Distribution of University Entry National Exam Marks (2013) © Nguyễn Tiến Dũng Applied Statistics for Business 11
Weather Statistics © Nguyễn Tiến Dũng Applied Statistics for Business 12
Source: http://finance.vietstock.vn/, accessed 16 Aug 2014 © Nguyễn Tiến Dũng Applied Statistics for Business 13
1.3 Data Sources ● Existing sources (secondary data) © Nguyễn Tiến Dũng Applied Statistics for Business 14
© Nguyễn Tiến Dũng Applied Statistics for Business 15
General Statistical Office in Vietnam: www.gso.gov.vn © Nguyễn Tiến Dũng Applied Statistics for Business 16
© Nguyễn Tiến Dũng Applied Statistics for Business 17
© Nguyễn Tiến Dũng Applied Statistics for Business 18
Statistical Studies (primary data) ● Observational studies ● Descriptive research ● Including: ● Observations ● Diaries ● In-depth interviews ● Group discussions ● Surveys ● Experimental studies ● Causal research ● Including ● Experiments in a simulated condition ● Experiments in a real condition © Nguyễn Tiến Dũng Applied Statistics for Business 19
Survey Questionnaires © Nguyễn Tiến Dũng Applied Statistics for Business 20