lecture3 - Why are graphs important? Number of O-rings...

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Why are Why are graphs graphs important? important?
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Number of O-rings damaged Temp on Jan 28, 1986
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Why Graph? • Summarize complex data visually • Analyze trends in data • Communicate results to others • Learning and problem solving
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Types of Data • Categorical: mutually exclusive groups
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Types of Data • Continuous: infinitely divisible into smaller parts (just add decimal places)
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Types of Data • Discrete: continuum with certain values (usually whole)
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Essential Parts of a Graph
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Types of Graphs • Bar graphs • Best for discrete and categorical data for independent variable • Histograms are special bar graphs, which plot a frequency distribution
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Types of Graphs • Pie charts • Categorical or discrete data • Percentages or proportions Student movie preference
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Types of Graphs • Scatter plots • Best for continuous data for independent variable • Reveals relationships between data, called a correlation
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Correlation Temperature (˚C) Time (days) 0 10 10 30 Treatment Control 5
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Correlation Time (days) 0 10 30 Treatment Control Trend line Temperature (˚C) 10 5
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This note was uploaded on 09/23/2009 for the course BIO 150 taught by Professor Schmidt during the Spring '08 term at SUNY Stony Brook.

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lecture3 - Why are graphs important? Number of O-rings...

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