Die volgende relatiewe frekwensieverdeling is ‘n opsomming van die tyd (in minute) wat ‘n steekproef van telefoonoproepe geduur het. / The following relative frequency distribution summarizes the duration (in minutes) of a sample of telephone calls.

Die variasiewydte van die waarnemings is / The range of the observations is

Akademiese prestasie van huiskomiteelede van dameskoshuise is nie na wense nie aangesien hulle te veel tyd aan koshuisverpligtinge bestee. Uit al die dameskoshuise van die universiteit word 96 senior damestudente in ‘n ondersoek na die aangeleentheid betrek. Die akademiese prestasie (goed, gemiddeld of swak) van dames wat op ‘n huiskomitee dien (ja) en dames wat nie op ‘n huiskomitee dien nie (nee) is opgesom in die volgende gebeurlikheidstabel: / Academic achievements of house committee members of women’s residences are unsatisfactory because they devote too much time to residence duties. From all the women’s residences at the university, 96 senior female students were involved in an investigation regarding this matter. The academic achievement (good, average or poor) of women who served on house committees (yes) and those who did not (no) are summarised in the following contingency table:

Watter persentasie van die dames wat op ‘n huiskomitee dien presteer gemiddeld? / What percentage of women that  serve on a house committee perform average?

Die volgende relatiewe frekwensieverdeling is ‘n opsomming van die tyd (in minute) wat ‘n steekproef van telefoonoproepe geduur het. / The following relative frequency distribution summarizes the duration (in minutes) of a sample of telephone calls.

As daar altesaam 18 oproepe is wat 25 minute of langer duur, hoeveel oproepe duur minder as 15 minute? / If there are 18 calls lasting 25 minutes or more, how many calls lasted less than 15 minutes?

The appropriate graph to illustrate the relationship between two quantitative variables is called

/

Die toepaslike grafiek om die verwantskap tussen twee kwantitatiewe veranderlikes te illustreer, is