The file Bulbs contains the life (in hours) of a sample of 40 100-watt light bulbs produced

Question:

The file Bulbs contains the life (in hours) of a sample of 40 100-watt light bulbs produced by Manufacturer A and a sample of 40 100-watt light bulbs produced by Manufacturer B. The following table shows these data as a pair of ordered arrays:
a. Construct a frequency and a percentage for each manufacturer, using the following class interval widths for each A: 650 but less than 750, 750 but less than 850, and so on.
Manufacturer B: 750 but less than 850, 850 but less than 950, and so on.
b. Construct cumulative percentage distributions.
c. Which bulbs have a longer life-those from Manufacturer A or Manufacturer B? Explain. Distribution
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