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frequentieverdeling
 Frequentietabel:
    Ordenen van verzamelde gegevens.
    Groeperen in volgorde van grootte
 Soorten     frequenties:
    Absolute frequentie (f):
     Aantal keren dat een meetwaarde voorkomt (ook wel frequentie).
    Relatieve frequentie (rf):
     Geeft de absolute frequentie per meetwaarde weer in een
     percentage van de som van de frequenties (n)
    Cumulatieve frequentie (cum f en cum rf):
     Optellen van de absolute en/of de relatieve frequentie.
Tabel 2.1 Frequentietabel. Het verkochte aantal artikelen per klant tussen 15.00-16.00 uur

Aantal artikelen              Turfstaatje                   Frequentie (f)
1                                                           6
2                                                           6
3                                                           2
4                                                           3
5                                                           2
6                                                           2
7                                                           1
8                                                           2
9                                                           1
totaal                        25                            25
Tabel 2.2 Het aantal verkochte artikelen per klant tussen 15.00-16.00 uur

   Aantal artikelen                               Frequentie (f)
                                      absoluut                    relatief in %
             1                             6                                24
             2                             6                                24
             3                             2                                8
             4                             3                                12
             5                             2                                8
             6                             2                                8
             7                             1                                4
             8                             2                                8
             9                             1                                4
          totaal                           25                           100
Tabel 2.3 Het aantal verkochte artikelen per klant tussen 15.00-16.00 uur

Aantal artikelen         Absolute Frequentie             Relatieve frequentie in
                                                                    %
                              f            Cum f               rf           Cum rf
          1                   6               6               24              24
          2                   6               12              24              48
          3                   2               14               8              56
          4                   3               17              12              68
          5                   2               19               8              76
          6                   2               21               8              84
          7                   1               22               4              88
          8                   2               24               8              96
          9                   1               25               4             100
       totaal                25                               100
 Maken   opgaven 36 en 37. blz. 81. 10 min
   Klassen:
     verzameling met min of meer dezelfde meetwaarde.
     Bij klassenindeling rekening houden met:
           Aantal klassen: aantal moet 2 à 5 maal zo groot als het aantal cijfers van het getal
            dat het aantal waarnemingen aangeeft.
           Klassengrenzen: waarde tussen 2 opeenvolgende klassen.
           Ondergrens en bovengrens: bijv. 10 -<20 is :
              10 de ondergrens en
              19,99 de bovengrens.
              10 -< 10 is de klassenbreedte.
           Gelijke of ongelijke klassen
           Open of gesloten klassen

   Frequentietabel met Klassen:
       Overzichtelijk presenteren van gegevens in dezelfde klassen.

   Voorbeeld blz.63:
     het teken -< betekent tot kleiner dan.
     Het teken >- betekent groter dan.
€ 0,-    -< €   10,-
€10,-    -< €   20,-
€ 20,-   -< €   30,-
€ 30,-   -< €   40,-
€ 40,-   -< €   50,-
€ 50,-   -< €   60,-
Aantal          turfstaatje   Absolute Frequentie   Relatieve frequentie in
 artikelen                                                       %
                                   f        Cum f         rf        Cum rf
€ 0,- -< € 10,-                   2           2           8            8
€10,- -< € 20,-                   6           8          24           32
€20,- -< € 30,-                   9           17         36           68
€30,- -< € 40,-                   3           20         12           80
€40,- -< € 50,-                   3           23         12           92
€50,- -< € 60,-                   2           25          8          100
   totaal                         25                     100
 Maak   opgaven 40 en 42.blz. 83

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Les 3. Blok 3 Statistiek Frequentieverdeling 2.

  • 2.  Frequentietabel:  Ordenen van verzamelde gegevens.  Groeperen in volgorde van grootte  Soorten frequenties:  Absolute frequentie (f): Aantal keren dat een meetwaarde voorkomt (ook wel frequentie).  Relatieve frequentie (rf): Geeft de absolute frequentie per meetwaarde weer in een percentage van de som van de frequenties (n)  Cumulatieve frequentie (cum f en cum rf): Optellen van de absolute en/of de relatieve frequentie.
  • 3. Tabel 2.1 Frequentietabel. Het verkochte aantal artikelen per klant tussen 15.00-16.00 uur Aantal artikelen Turfstaatje Frequentie (f) 1 6 2 6 3 2 4 3 5 2 6 2 7 1 8 2 9 1 totaal 25 25
  • 4. Tabel 2.2 Het aantal verkochte artikelen per klant tussen 15.00-16.00 uur Aantal artikelen Frequentie (f) absoluut relatief in % 1 6 24 2 6 24 3 2 8 4 3 12 5 2 8 6 2 8 7 1 4 8 2 8 9 1 4 totaal 25 100
  • 5. Tabel 2.3 Het aantal verkochte artikelen per klant tussen 15.00-16.00 uur Aantal artikelen Absolute Frequentie Relatieve frequentie in % f Cum f rf Cum rf 1 6 6 24 24 2 6 12 24 48 3 2 14 8 56 4 3 17 12 68 5 2 19 8 76 6 2 21 8 84 7 1 22 4 88 8 2 24 8 96 9 1 25 4 100 totaal 25 100
  • 6.  Maken opgaven 36 en 37. blz. 81. 10 min
  • 7. Klassen:  verzameling met min of meer dezelfde meetwaarde.  Bij klassenindeling rekening houden met:  Aantal klassen: aantal moet 2 à 5 maal zo groot als het aantal cijfers van het getal dat het aantal waarnemingen aangeeft.  Klassengrenzen: waarde tussen 2 opeenvolgende klassen.  Ondergrens en bovengrens: bijv. 10 -<20 is :  10 de ondergrens en  19,99 de bovengrens.  10 -< 10 is de klassenbreedte.  Gelijke of ongelijke klassen  Open of gesloten klassen  Frequentietabel met Klassen:  Overzichtelijk presenteren van gegevens in dezelfde klassen.  Voorbeeld blz.63:  het teken -< betekent tot kleiner dan.  Het teken >- betekent groter dan.
  • 8. € 0,- -< € 10,- €10,- -< € 20,- € 20,- -< € 30,- € 30,- -< € 40,- € 40,- -< € 50,- € 50,- -< € 60,-
  • 9. Aantal turfstaatje Absolute Frequentie Relatieve frequentie in artikelen % f Cum f rf Cum rf € 0,- -< € 10,- 2 2 8 8 €10,- -< € 20,- 6 8 24 32 €20,- -< € 30,- 9 17 36 68 €30,- -< € 40,- 3 20 12 80 €40,- -< € 50,- 3 23 12 92 €50,- -< € 60,- 2 25 8 100 totaal 25 100
  • 10.  Maak opgaven 40 en 42.blz. 83