Data Mining and Knowledge Discovery Handbook, 2 Edition part 23. Knowledge Discovery demonstrates intelligent computing at its best, and is the most desirable and interesting end-product of Information Technology. To be able to discover and to extract knowledge from data is a task that many researchers and practitioners are endeavoring to accomplish. There is a lot of hidden knowledge waiting to be discovered – this is the challenge created by today’s abundance of data. Data Mining and Knowledge Discovery Handbook, 2nd Edition organizes the most current concepts, theories, standards, methodologies, trends, challenges and applications of data mining (DM) and knowledge discovery. | 200 Paola Sebastiani Maria M. Abad and Marco F. Ramoni Variable Description Type State description Hoh birth region Nominal England Scotland and Wales No of adult females Ordinal No of adult males No of children Age of Hoh Gender of Hoh Accommodation No of bedrooms No of cars House status 0 1 2 0 1 2 0 1 2 3 4 17-36 36-50 50-66 66-98 Ordinal Ordinal Numeric Nominal M F Nominal Room Flat House Other Ordinal 1 2 3 4 Ordinal 1 2 3 4 Nominal Rent Owned Soc-Sector Region Adfems Admales Children Hohage Hohgend Accomod Bedrms Ncars Tenure Hohreslen Length of residence Numeric 0-3 3-9 9-19 19 months Hohorigin Hoh ethnicity Nominal Caucas. Black Chin. Indian Other Hohstatus Status of Hoh Nominal Active Inactive Retired Table . Description of the variables used in the analysis. Hoh denotes the Head of the Household. Numbers of adult males females and children refer to the household. of the household increases. The dependency of the gender of the household head on the ethnic group shows that Blacks have the smallest probability of having a male head of the household 64 while Indians have the largest probability 89 . Other interesting discoveries are that the age of the head of the household depends directly on the number of adult males and females and shows that households with no females and two or more males are more likely to be headed by a young male while on the other hand households with no males and two or more females are headed by a mid age female. There appear to be more single households headed by an elder female than an elder male. Also the composition of the household changes in the ethnic groups and Indians have the smallest probability of living in a household with no adult males 10 while Blacks have the largest probability 32 . By propagating the network one may investigate other undirected associations and discover that for example the typical Caucasian mid family with two children has 77 chance of being headed by a male who with probability .57 is aged .
