5 Comparing samples (1)

5 Comparing samples (1) - Dr. Harvey A. Singer School of...

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© 2002 by Harvey A. Singer 1 OM 210:  Statistical Analysis for  Management Data Presentation: 5 : Presenting and Comparing Different-sized Samples Dr. Harvey A. Singer School of Management George Mason University
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© 2002 by Harvey A. Singer 2 Comparing Two Sets of Data Comparing two or more data sets of different sizes n . Essential to compare on a relative basis. Relative frequency and cumulative relative frequency distributions. Percent histograms, polygons, and ogives.
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© 2002 by Harvey A. Singer 3 100-watt light bulb lifetimes in hours Manufacturer A ( n = 20): 684 720 773 831 852 859 870 893 909 922 926 939 943 954 972 997 1005 1016 1052 1080 Manufacturer B ( n = 16): 819 897 907 942 952 986 1012 1017 1026 1032 1048 1067 1096 1101 1119 1133 For purposes of comparison, take class intervals of 100 hours for the distribution for each brand.
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© 2002 by Harvey A. Singer 4 Frequency Distributions Lifetime (hours) Brand A Brand B 600 to < 700 1 700 to < 800 2 800 to < 900 5 2 900 to < 1000 8 4 1000 to < 1100 4 7 1100 to < 1200 3 Total 20 16
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© 2002 by Harvey A. Singer
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This note was uploaded on 01/26/2011 for the course OM 210 taught by Professor Singer during the Fall '08 term at George Mason.

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5 Comparing samples (1) - Dr. Harvey A. Singer School of...

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