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Organizing Data

Organizing Data. Section 2.1. Organize Qualitative Data. A frequency distribution lists each category of data and the number of occurrences for each category of data. Let use an example and build a Frequency Table. Relative frequency.

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Organizing Data

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  1. Organizing Data Section 2.1

  2. Organize Qualitative Data • A frequency distribution lists each category of data and the number of occurrences for each category of data. • Let use an example and build a Frequency Table.

  3. Relative frequency • The relative frequency is the proportion (or percent) of observations within a category and is found using the formula: • A relative frequency distribution lists the relative frequency of each category of data.

  4. Our Example • Determine the relative frequency distribution for our example • Use these to make a table of relative frequencies

  5. M&M’s

  6. Find the Sum

  7. Bar graphs • A bar graph is constructed by labeling each category of data on either the horizontal or vertical axis and the frequency or relative frequency of the category on the other axis • Frequency or Relative Frequency

  8. Bar graph of Frequencies

  9. Bare graph of Relative Frequencies

  10. Pie Chart The following data represent the marital status (in millions) of U.S. residents 18 years of age or older in 2006. Draw a pie chart of the data.

  11. Pareto Chart

  12. Marital Status in 1990 vs. 2006 1990 2006 Relative Frequency Marital Status

  13. Quantitative Data The following data represent the number of available cars in a household based on a random sample of 50 households. Construct a frequency and relative frequency distribution. 3 0 1 2 1 1 1 2 0 2 4 2 2 2 1 2 2 0 2 4 1 1 3 2 4 1 2 1 2 2 3 3 2 1 2 2 0 3 2 2 2 3 2 1 2 2 1 1 3 5

  14. Quantitative Data

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