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Section 14.1

Section 14.1. Organizing and Visualizing Data. Objectives. Describe the population whose properties are to be analyzed. Organize and present data. Key Terms.

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Section 14.1

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  1. Section 14.1 Organizing and Visualizing Data

  2. Objectives • Describe the population whose properties are to be analyzed. • Organize and present data.

  3. Key Terms • Statistics: an area in mathematics where we are interested in gathering, analyzing, presenting, and making predictions from numerical information. • Data (Distribution): a collection of numerical information. • Population: entire collection of items that is the focus of the survey. • Sample: a subset of the population. • Biased: sample does not accurately reflect the population as a whole with regard to data gathered. • Selection Bias: how you chose the people to participate in the survey. • Leading Question Bias: the way a question is asked in a survey.

  4. Key Terms • Frequency Distribution: A set of data listed with their frequencies. • Relative Frequency Distribution: contains the percent of time that each item occurred. • Frequency Table: a table that lists items and number of times it occurs • Bar Graph: a graph that compares different amounts using bars. • Histogram: a special type of bar graph used to graph frequency distribution. • Stem-and-Leaf Display: a method of presenting data in a graphical formal, similar to a histogram. It is used to assist in visualizing the shape of a distribution.

  5. Example 1: Construct frequency table, relative frequency table, & bar graph • TB pg. 786/1

  6. Example 2:Construct a bar graph for the data • TB pg. 786/3

  7. Example 3:Draw a bar graph • TB pg. 786/5

  8. Example 4:Group and draw histogram • TB pg. 786/9

  9. Example 5: • TB pg. 787/13

  10. Example 6: • TB pg. 788/15

  11. Example 7:Comparing Wage Data • TB pg. 788/17

  12. Example 8:Comparing Wage Data • TB pg. 788/19

  13. Example 9:Stem-and-Leaf Plot • TB pg. 788/23

  14. Example 10:Comparing Training Programs • TB pg. 789/25

  15. Section 14.1 Assignment • Class work: • TB pg. 786/2 – 6 Even, and 26 Even • Remember you must write problems and show ALL work to receive credit for the assignment. • Due Friday, Dec. 09, 2011.

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