MATH 1107 Elementary Statistics

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MATH 1107Elementary Statistics

• Lecture 2
• Frequency Distributions
• and Visualizations of Categorical Data

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MATH 1107 - Visualization

• January 28, 1986 the Challenger Space Shuttle
  exploded killing 7 astronauts.
• Direct cause was the faulty seal of 2 rubber O
  rings.
• The indirect cause of the tragedy was poor data
  presentation.

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MATH 1107 - Visualization

• Edward Tufte is considered the authority on the
  Visual Display of Quantitative Information. Some
  of his thoughts -
• Clear and intelligent design not only reflects,
  but also spurs clear and intelligent thought.
• Clutter and confusion are failures of design,
  not attributes of the information.
• Bad graphics fail because they omit or
  manipulate context, deceive by discouraging
  comparison or obscuring important details.

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MATH 1107 - Visualization
Fun in class exercise!
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MATH 1107 - Visualization

• Lets examine a different perspective of the
  Titanic passenger examples in your book

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MATH 1107 - Visualization

• Converting frequency counts into more meaningful
  and communicative information is an important
  skill. Specifically, you should be able to
  convert this data into the following
• Marginal percentages
• Conditional percentages
• Bar Chart
• Pie Chart
• We will execute these in EXCEL refer to the
  notes on the website.