# 2.22 The file contains the life (in hours) of a sample of 40 100-watt light bulbs produced by… 1 answer below »

2.22 The file 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 array
Manufacturer A Manufacturer B 684 697 720 773 821 819 836 888 897 903 831 835 848 852 852 907 912 918 942 943 859 860 868 870 876 952 959 962 986 992 893 899 905 909 911 994 1,004 1,005 1,007 1,015 922 924 926 926 938 1,016 1,018 1,020 1,022 1,034 939 943 946 954 971 1,038 1,072 1,077 1,077 1,082 972 977 984 1,005 1,014 1,096 1,100 1,113 1,113 1,116 1,016 1,041 1,052 1,080 1,093 1,153 1,154 1,174 1,188 1,230
a. Construct a frequency distribution and a percentage distribution for each manufacturer, using the following class interval widths for each distribution: Manufacturer 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.

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