Page 48 - Demo

%u062c%u0645%u064a%u0639 %u0627%u0644%u062d%u0642%u0648%u0642 %u0645%u062d%u0641%u0648%u0638%u0629 %u0640 %u0627%u0625%u0644%u0639%u062a%u062f%u0627%u0621 %u0639%u0649%u0644 %u062d%u0642 %u0627%u0645%u0644%u0624%u0644%u0641 %u0628%u0627%u0644%u0646%u0633%u062e %u0623%u0648 %u0627%u0644%u0637%u0628%u0627%u0639%u0629 %u064a%u0639%u0631%u0636 %u0641%u0627%u0639%u0644%u0647 %u0644%u0644%u0645%u0633%u0627%u0626%u0644%u0629 %u0627%u0644%u0642%u0627%u0646%u0648%u0646%u064a%u062948c- Sampling with replacement: a selected object is not removed from the population d- Stratified sampling: Partition the data set, and draw samples from each partition (proportionally, i.e., approximately the same percentage of the data) Used in conjunction with skewed data Cluster/Stratified Sample Data Cube Aggregation: The cube created at the lowest abstraction level is referred to as the base cuboid. The base cuboid should correspond to an individual entity of interest such as sales or customer. In other words, the lowest level should be usable, or useful for the analysis. A cube at the highest level of abstraction is the apex cuboid. 3- Data Compression: a-String compression: there are extensive theories and well-tuned algorithms, it is typically lossless, but only limited manipulation is possible without expansion b- Audio/video compression: it is typically Raw Data