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Data Representation Methods for Categorical and Numerical Data Analysis

Learn to showcase data using pie charts, bar charts, stem-and-leaf plots, histograms, and more. Practice with sample datasets; explore organizing and visualizing data effectively in both categorical and numerical forms.

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Data Representation Methods for Categorical and Numerical Data Analysis

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  1. Statistics 3 Project Maths Miss Cullen

  2. How do I represent data • Remember... • Categorical Data: Pie Charts and Bar Charts are used • Numerical Data: • Discrete: bar chart, pie chart, line plot, stem and leaf are used • Continuous: histograms are used

  3. What is a Stem and Leaf? 160, 162, 170, 171, 175, 172, 165, 171, 164, 177, 171, 160, 172, 162, 159, 173, 157, 166, 165, 174, 181, 165, 168, 162, 182, 167, 157, 162, 163, 180. Original Data ( Sample of 30) 14 157, 157, 159, 160, 160, 162, 162, 162, 162, 163, 164, 165, 165, 165, 166, 167, 168, 170, 171, 171, 171, 172, 172, 173, 174, 175, 177, 180, 181, 182. Ordered Data 15 N = 30 ( Sample Size) Height in cm. 16 17 7 7 9 18 0 0 2 2 2 2 3 4 5 5 5 6 7 8 19 0 1 1 1 2 2 3 4 5 7 0 1 2 18 2 = 182 Key/ Legend from Presentation Listowel

  4. 14 15 16 17 7 7 9 18 0 0 2 2 2 2 3 4 5 5 5 6 7 8 19 0 1 1 1 2 2 3 4 5 7 0 1 2 from Presentation Listowel

  5. Back to Back Stem and Leaf Canadian Girls ( Sample of 30) Ordered. Height in cm 150, 154, 154, 155, 157, 159, 160, 160, 160, 161, 161, 162, 162, 162, 163, 163, 164, 164, 165, 165, 166, 166, 167, 167, 168, 169, 170, 170, 173, 177. Sample B. Canadian girls Sample A. Irish girls 14 Back to Back Stemplot. 9 7 5 4 4 0 15 7 7 9 4 4 3 3 2 2 2 1 1 1 0 0 0 16 0 0 2 2 2 2 3 4 9 8 7 7 6 6 5 5 16 5 5 5 6 7 8 7 3 0 0 17 0 1 1 1 2 2 3 4 5 7 18 0 1 2 19 18 2 = 182 Key/ Legend from Presentation Listowel

  6. Look at Our Results • Have a look through the results from the Online Questionnaire • Pick one (or more) category/categories of information and choose an appropriate method of representation • Using Excel or on paper create a display for your chosen piece(s) of information

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