Sampling

Descripción

Bsc Hons Data Mining Mapa Mental sobre Sampling, creado por Steve Hiscock el 15/12/2013.
Steve Hiscock
Mapa Mental por Steve Hiscock, actualizado hace más de 1 año
Steve Hiscock
Creado por Steve Hiscock hace alrededor de 12 años
18
0

Resumen del Recurso

Sampling
  1. Simple Random Sample
    1. Seed number. The chance of selection is equal
      1. Elements selected independently
    2. Systematic
      1. Taking every nth observation
      2. Take the first n examples
        1. Stratified - Classifying the data, and taking random samples
          1. Unbalanced stratified
            1. Taking a random sample, from each class not proportional to the class sizes
          2. Overfitting
            1. Perfect fits to the data, when its like in reality unlike to be perfect
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