7-8 - Misleading Graphs and Statistics Lesson 7-8 Questions...

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Misleading Graphs and Statistics Lesson 7-8
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Questions to Ask When Looking at Data and/or Graphs Is the information presented correctly? Is the graph trying to influence you? Does the scale use a regular interval? What impression is the graph giving you?
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Why is this graph misleading? This title tells the reader what to think (that there are huge increases in price). The actual increase in price is 2,000 pounds, which is less than a 3% increase. The graph shows the second bar as being 3 times the size of the first bar, which implies a 300% increase in price. The scale moves from 0 to 80,000 in the same amount of space as 80,000 to 81,000.
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A more accurate graph: An unbiased title A scale with a regular interval. This shows a more accurate picture of the increase.
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Why is this graph misleading? The scale does not have a regular interval.
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Graphs can be misleading in the news. The margin of error is the amount (usually in percentage points) that the results can be “off by.” Be wary of data with large margins of error.
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From CNN.com
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This note was uploaded on 11/17/2011 for the course MATH 110 taught by Professor Staff during the Fall '08 term at BYU.

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7-8 - Misleading Graphs and Statistics Lesson 7-8 Questions...

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