ISP 120 Mathematical

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ISP 120 Mathematical Technological Literacy I

• October 4, 2007
• Benjamin Graham, MS, LCPC

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Agenda for Today

• Announcements
• Mid-term Online course feedback survey
• Homework 3
• Mid-term exam on Thursday, 10/11
• In lecture
• Midterm review Critiques of graphs
• What makes an effective graph?
• MapMaker
• In Computer Lab
• Completing Tuesdays activity
• Effective graph activity

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Review Critiquing graphs

• Whats wrong with this graph?

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No y axis!
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Review Critiquing graphs

• Whats wrong with this graph?

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Review Critiquing graphs

• A line graph (XY graph) should not be used for a
  nonlinear X. To Fix?
• To fix the problem, remove the maximum depth
  column from the line.

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Choosing which graph to use

• Pie
• easy to understand
• - limited in its applicability.
• X variable must be categorical (e.g., from
  Indiana, Illinois, Wisconsin)
• X variable must be non-overlapping (disjoint).
• The total of all categories must add up to 100

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X-Y (line) Graph

• Very common.
• Requires that your X variable is a continuous
  number (e.g. height, weight)
• Important to review the X axis to make sure that
  each mark on the X axis is spaced consistently
  from each other, like on a ruler or mileage
  markers on the interstate.

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Bar Charts

• Bar charts  -
• Bar charts are very flexibleallow you to work
  with lots of different types of data.
• They can be used whenever there is a quantitative
  variable associated with the a categorical
  variable, and they can be used with a
  quantitative x-axis.
• They are great when you have a limited amount of
  data or when you what to compare more than one
  series. 
• They can look different ways

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What makes an effective graph?

• Each of criteria from the three types of graphs
  listed above are considered
• Selection of the graph that will best convey your
  data
• It is possible to have more than one effective
  graph

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Mapmaker

• MapMaker as a resource
• Using MapMaker Activity 5 example
• Note You do not need to do Activity 5, Item
  Jwell cover it now.

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Mapmaker

• Another example Global HIV