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Blz. 15-3
Raadpleeg Hoofdstuk 17 in de gebruikshandleiding voor meer informatie over
willekeurige getallen in de rekenmachine. In Hoofdstuk 17 van de
gebruikshandleiding wordt met name het gebruik van de functie RDZ om
lijsten van willekeurige getallen opnieuw te activeren uitvoerig behandeld.
Het menu MTH/PROBABILITY.. – deel 2
In dit gedeelte behandelen we vier doorlopende kansverdelingen die
gewoonlijk gebruikt worden voor problemen m.b.t. statistische deductie: de
normale verdeling, de Student t-verdeling, de Chi-kwadraat-verdeling (χ
2
) en
de F-verdeling. De functies in de rekenmachine om kansen te evalueren voor
deze verdelingen zijn NDIST, UTPN, UTPT, UTPC en UTPF. Deze functies
bevinden zich in het menu MTH/PROBABILITY dat we eerder in dit Hoofdstuk
behandeld hebben. Open het menu MTH voor deze functies: „´ en
selecteer de optie PROBABILITY:
De normale verdeling
De functies NDIST en UTPN hebben betrekking op de Normale verdeling met
gemiddelde µ en variantie σ
2
.
Gebruik de functie NDIST(µ,σ
2
,x) om de waarde van de kansdichtheidsfunctie
(pdf) van de f(x) voor de normale verdeling te berekenen. Controleer
bijvoorbeeld dat voor een normale verdeling NDIST(1.0, 0.5, 2.0) =
0.20755374. Deze functie is handig om de Normale verdeling (pdf) te
plotten.
165


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