Computer Science 1032A/B Lecture Notes - Lecture 4: Data Quality

• School: Western University
• Department: Computer Science
• Course: Computer Science 1032A/B
• Professor: Louis Magguilli

Document Summary

Data that has been organized and processed to be meaningful to a person (or other information system) who (or which) will use it. Inferred from information using the information derived from data to support conclusions. Note: some people discuss wisdom as being above all these three levels, rare though. Data is processed into information in 2 ways: Computation creates information by carrying out a predefined process on two or more data items. Comparison selects processing steps on the basis of data in an information system. Example: comparing the difference between the youngest and oldest student in cs1032. Data quality: dirty data, missing values, inconsistent data, data not integrated. Produces bad information - regardless of the quality of the comparison or computation. Put all this together comes down to simply: get the right information to the right people at the right time in the right format.