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Statistics

Statistics. Introduction to statistics. Introduction Types of statistics Sampling 4. General steps in statistics & introduction of brief data analysis. 1. General Introduction.

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Statistics

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  1. Statistics

  2. Introduction to statistics • Introduction • Types of statistics • Sampling 4. General steps in statistics & introduction of brief data analysis

  3. 1. General Introduction • Statistics is a branch of mathematics concerned with the procedures for collecting, describing, analyzing and interpreting numeric data.

  4. The Misuse of Statistics • Poor or misleading visual presentation

  5. 2. Types of Statistics • Descriptive vs. Inferential Statistics

  6. 3. Sampling • Population vs. Sample • Benefits: • Timeliness • Cost • Accessibility • Dynamic nature of business/market

  7. Features • A sample should be representative of the population, that is, all the characteristics that are present in the population must also be found in the sample. • Chosen at random • Unbiased

  8. Methods • Simple Random or Lottery Method • Systematic Sample (array) • Stratified Sample • Quota Sample • Cluster Sample • Multi-Staged

  9. 4. General Steps • Set an objective • Gathering of information • Analysis of the data (decision-making, reduction of risks, etc.) • Organization/Presentation of the data

  10. Brief Analysis of the data • Array • Frequency Distribution (tally) • Grouped Frequency Distribution (class interval) • Histogram • Frequency Polygon • Ogive

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