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======Chapter2: Frequency Distribution======

=====Guide=====

The first step in analyzing data is to conduct descriptive statistics. Descriptive statistics is a statistical method used to organize, summarize, and simplify data. In descriptive statistics, we can use frequency distribution to categorize and organize data. In this chapter, we will learn about the frequency distribution table, frequency distribution map, the shape of frequency distribution, and master percentile, percentile rank, and interpolation.

=====Points=====

  - Learn to draw frequency distribution, cumulative frequency distribution, and grouping frequency distribution tables;
  - Learn to use stem and leaf charts, histograms, bar graphs, and frequency distribution ploygons to show frequency distribution;
  - Understand positive skewed distribution and negative skewed distribution;
  - Master percentiles and interpolation methods.

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=====Contents=====

  - [[frequency-distribution-table-english|Frequency distribution table]]
  - [[frequency-distribution-graph-english|Frequency distribution graph]]
  - [[stem-and-leaf-display-english|Stem and leaf display]]
  - [[the-shape-of-frequency-distribution-english|The shape of frequency distribution]]
  - [[percentile-english|Percentile, percentile rank, and interpolation]]

====Homework====

  - [[homework1|Chapter 2 homeworks of 2023]]
  - [[2024homework2|Chapter 2 homeworks of 2024]]