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Visualizing Qualitative vs. Quantitative Data definitions

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  • Qualitative Data
    Observations represented by names or labels, not numbers; often visualized with charts showing categories.
  • Quantitative Data
    Observations expressed as numerical values; suitable for charts displaying continuous or discrete numbers.
  • Bar Chart
    Vertical bars display frequencies for categories; bar height reflects the number of observations.
  • Pareto Chart
    Special bar chart with bars arranged in descending order to highlight the most significant categories.
  • Pie Chart
    Circular chart divided into wedges, each representing a category's percentage of the total dataset.
  • Histogram
    Bar graph for numerical data; bars touch to indicate continuous classes, showing frequency distribution.
  • Frequency Polygon
    Line graph alternative to a histogram; points connected by lines represent frequencies for numerical classes.
  • Stem-and-Leaf Plot
    Table format splitting numbers into stems and leaves, revealing actual data values and their frequency.
  • Frequency
    Count of observations within a category or class; fundamental for interpreting charts and distributions.
  • Category
    Distinct group or label used in qualitative data; forms the basis for grouping in bar and pie charts.
  • Class
    Interval or range of numerical values used in quantitative charts like histograms and frequency polygons.
  • Proportion
    Fraction or percentage of the total represented by a category; often visualized in pie charts.
  • Central Tendency
    Statistical concept describing the center or typical value in a dataset, relevant in data visualization.
  • Variability
    Measure of how spread out data values are; important for understanding distributions in visualizations.
  • Descriptive Statistics
    Methods for summarizing and visualizing data, including charts and measures of frequency and spread.