Graphic Displays and Types of Data

Card Set Information

Author:
chanchan27104
ID:
293101
Filename:
Graphic Displays and Types of Data
Updated:
2015-01-15 16:03:06
Tags:
statistics
Folders:
ST 311
Description:
Graphity graph stuff
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  1. Categorical Data
    places a subject into one of several groups or categories
  2. Quantitative Data
    • Also called numeric
    • Numbers are actually numbers --> make sense as numbers and can be used that way
  3. Graphing Categorical Data
    • Pie charts and bar charts
    • How many or what percentage of individuals are in each category
    • How the subjects are distributed across the categories
  4. Graphing Quantitative Data
    • Histograms and dot plots can be used for quantiative data
    • Describes the distribution of a quantitative variable
  5. What does it mean when a histogram is skewed to the right?
    • Long tail to the right
    • Generally because individuals are stacked up near a lower limit and unlimited on the upper end
  6. What does it mean when the histogram is skewed to the left?
    • Long tail to the left
    • Generally because individuals are stacked up near an upper limit and unlimited on the lower end
  7. What does it mean when a histogram is symmetric?
    • Tails approximately equal in both directions
    • Major cluster far from limits on both ends
  8. What does it mean when a histogram is bimodal?
    • Two peaks in the histogram
    • Caused by two or more groups
  9. Outliers
    • unusual values that do not fi with the rest of the pattern
    • May be data entry errors or may be actual uusual variables

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