Edexcel AS Level Maths Statistics

Edexcel As Level Maths Statistics With
100% Correct Answers
Population r- rCORRECT✅✅The rwhole rset rof ritems rthat rare rof rinterest

Census r- rCORRECT✅✅Observes ror rmeasures revery rmember rof ra rpopulation

Advantages rof ra rcensus r- rCORRECT✅✅It rshould rgive ra rcompletely raccurate
rresult


Disadvantage rof ra rcensus r- rCORRECT✅✅Time rconsuming rand rexpensive
Hard rto rprocess rlarge rquantity rof rdata

Sample r- rCORRECT✅✅A rselection rof robservations rtaken rfrom ra rsubset rof rthe
rpopulation rwhich ris rused rto rfind rout rinformation rabout rthe rpopulation ras ra rwhole


Advantages rof ra rsample r- rCORRECT✅✅Less rtime rconsuming r
Fewer rpeople rhave rto rrespond
Less rdata rthan ra rcensus

Disadvantage rof ra rsample r- rCORRECT✅✅The rdata rmay rnot rbe ras raccurate
The rdata rmay rnot rbe rlarge renough rtoggle rinformation rabout rthe rpopulation

Sampling rUnits r- rCORRECT✅✅Individual runits rof ra rpopulation

Sampling rFrame r- rCORRECT✅✅A rlist rof rindividually rnamed ror rnumbered rsampling
runits


Simple rRandom rSample r- rCORRECT✅✅A rsample rwhere revery rsampling runit rhas
ran requal rchance rof rbeing rchosen


Advantages rof rSimple rRandom rSample r- rCORRECT✅✅Free rof rbias r
Easy rand rcheap rto rimplement
Each rsampling runit rhas requal rchance rof rselection

Disadvantage rof rSimple rRandom rSample r- rCORRECT✅✅A rsampling rframe ris
rneeded
Not rsuitable rwhen rthe rpopulation rsize ris rvery rbig

Systematic rSampling r- rCORRECT✅✅A rmethod rof rsampling rwhere rthe rrequired
relements rare rchosen rat rregular rintervals rfrom ran rordered rlist