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Business intelligence practica sessie 1

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Oplossingen met prinsscreens van de zelfevaluaties, practica sessie 1.

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  • April 16, 2020
  • 10
  • 2019/2020
  • Class notes
  • Unknown
  • All classes
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Business intelligence

Zelfevaluatie: Data-exploratie in WEKA
Download de mushroom dataset van Ufora, en open deze in WEKA. Beantwoord
vervolgens onderstaande vragen.

Hoeveel instances telt deze dataset?
£ 23
£ 1
£ 22
R 8124




Er zijn 8124 instances in deze dataset.

Hoeveel attributen telt deze dataset?
R 23
£ 22
£ 1




Hoeveel instances zijn "edible"?
£ 3916
R 4208
£ 8124




Er zijn 4208 instances die tot de klasse "e"="edible" behoren. 3916 instances zijn "poisonous",
of dus "p". In totaal zijn er 8124 instances

, 2


Hoeveel mogelijke waarden zijn er voor ring-type?
£ 7
R 5
£ 9
£ 3




Volgende 5 waarden voor ring-type zijn mogelijk: p, e, l, f, n.

Voor hoeveel instances is habitat gelijk aan "m"?
£ 3916
£ 4208
R 292
£ 368




Als je in Weka het attribuut selecteert, kan je voor elke (nominale) waarde zien, hoeveel
instances deze waarde hebben. Voor habitat="m" zijn er 292 instances.

Wat is het data-type van gill-size?
£ Numeriek
R Nominaal




Alle attributen in deze dataset zijn nominaal.

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