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Voorbeeld Onderstaande tabel geeft het resultaat van het meten van de lengte van
20 studenten. Welk percentage studenten heeft een grootte tussen 160,5
cm en 175,5 cm, en in welk percentiel vindt u de student van 175,5 cm?
Klasse
Grootte
(cm)
Frequentie
1 158,5 1
2 160,5 1
3 163,3 2
4 167,5 2
5 170,2 3
Klasse
Grootte
(cm)
Frequentie
6 173,3 4
7 175,5 2
8 178,6 2
9 180,4 2
10 186,7 1
1. Kies in het hoofdmenu de modus STAT.
2. Voer de groottes in de lijst 1 en de frequentie in lijst 2 in.
3. Maak de berekeningen voor statistische gegevens met één variabele.
U krijgt de
t-waarde onmiddellijk nadat u de berekeningen voor de statistische gegevens
met één variabele hebt ingevoerd.
(CALC)(SET)
(LIST)@U
A(LIST)AU)(QUIT)
(CALC)(1VAR)
4. Druk op K, kies de RUN • MAT (of RUN) modus, druk op *(E)(PROB)
((PROB) op de fx-7400G
II) om het menu voor waarschijnlijkheidsberekeningen (PROB)
op te roepen.
(PROB)*(E)(
t() @E?DU
* fx-7400G
II: (PROB)
(
t-waarde voor 160,5 cm) Resultaat: –1,633855948
(
–1,634)
(
t() @FDDU
(
t-waarde voor 175,5cm) Resultaat: 0,4963343361
(
0,496)
(P()?CHE
(P()@EBCU
(Percentage van het totaal) Resultaat: 0,638921
(63,9% van het geheel)
(R()?CHEU
(Percentiel) Resultaat: 0,30995
(31,0 percentiel)
163


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