1.5 Histograms

Objectives
  • Determine when a histogram is a good way to visualize a distribution (~25+ values, ~continuous data).
  • Determine the appropriate starting point and bin width for a frequency chart or histogram.
  • Break a list of values in bins and create a frequency chart.
  • Create a relative frequency chart from a frequency chart.
  • Create a cumulative frequency chart from a frequency chart.
  • Create a cumulative relative frequency chart from a cumulative frequency chart.
  • Create a histogram labeled with either the frequency or relative frequency on the vertical axis.
  • Create a cumulative frequency plot labeled with either the frequency or relative frequency on the vertical axis.
  • Interpret the quantity or percent of values in a given range by reading a histogram.
  • Interpret the quantity or percent of values in a given range by reading a cumulative frequency plot.
Vocabulary
  • Frequency: the number of items in a given range 
  • Relative frequency: the fraction/proportion of items in a given range compared to the total
  • Cumulative frequency: the number of items at or below a given value
  • Cumulative relative frequency: the fraction/proportion of the sum of the frequencies at or below a given value compared to the total
  • Bin: a range that values are grouped into to create a frequency chart, histogram, or cumulative frequency plot


Subpages (1): Homework Solutions
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Andy Pethan,
Feb 18, 2012, 9:27 PM
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