The file Bulbs contains the life (in hours) of a sample of forty 6-wait light emitting diode (LED) light bulbs produced by Manufacture A and a sample of forty 6- wait emitting diode (LED) light bulbs produced by Manufacture B.
Use the following class interval widths for each for each distribution:
Manufacturer
Manufacturer
a. Construct percentage histograms on separate graphs and plot the percentage
b. Plot cumulative percentage polygons on one graph.
c. which manufacturer has bulbs with a longer life-Manufacturer A or Manufacturer B? Explain.
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Basic Business Statistics, Student Value Edition
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