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Inleiding

In die wêreld rondom ons word inligting dikwels in die vorm van syfers, grafieke en tabelle gegee. Ons sien dit op die televisie, op die radio en in die koerante. Ons word blootgestel aan misdaadsyfers, sportuitslae, reënval, die uitgawes van die regering, die tempo van HIV/VIGS infeksie, bevolkingsgroei en ekonomiese groei.

Hierdie hoofstuk demonstreer hoe Wiskunde gebruik kan word om data te manipuleer, om data en tendense voor te stel of wan voor te stel en om oplossings te bied wat direk betrekking het op die wêreld rondom ons.

Vaardighede wat in vorige grade verwerf is en verband hou met die versameling, organisering, uitbeelding, analise en interpretasie van inligting, word hier verder ontwikkel.

Hersiening van vorige werk

Dataversameling is in vorige grade bekendgestel as 'n manier om antwoorde te kry vir vrae wat te make het met die wêreld rondom ons.

Data en datainsameling

Data

Data

Data verwys na inligting wat waargeneem of opgeneem is as deel van 'n eksperiment of 'n meningspeiling. Daar is twee tipes data: primêre en sekondêre data. Die woord "data" is die meervoud van die woord "datum".

Data kan geklassifiseer word as primêr of sekondêr , en primêre en sekondêre data kan verder geklassifiseer word as kwalitatief of kwantitatief . [link] som die klassifikasie van data op.

Klassifikasie van data
  • beskryf die oorspronklike data wat versamel is. Hierdie tipe data staan ook bekend as rou data. Dikwels is die primêre datastel baie groot en moet dit opgesom of verwerk word om betekenisvolle inligting uit te lig.
  • is inligting wat nie met getalle beskryf kan word nie, byvoorbeeld as jy data insamel oor hoe mense voel of wat hul gunstelingkleur is.
  • is inligting wat geskryf kan word as getalle, byvoorbeeld as jy data insamel oor mense se lengte of massa.
  • is primêre data wat opgesom of verwerk is. Die stel kleure wat mense as hul gunstelingkleure aangedui het, is 'n voorbeeld van sekondêre data omdat dit 'n opsomming is van mense se antwoorde.

Die proses om primêre data om te skakel na sekondêre data deur analise, groepering of organisering is die proses waardeur informasie geskep word.

Doelwit van die insameling van primêre data

Data word versamel om antwoorde te kry wat help om 'n sekere situasie beter te verstaan. Hier is 'n paar voorbeelde van dataversameling uit die regte wêreld wat kwalitatiewe en kwantitatiewe data illustreer.

Kwalitatiewe data

  • Die plaaslike regering sal wil weet hoeveel inwoners elektrisiteit het en mag dan aan hulle vra: "Het jou huis 'n veilige, ononderbroke toevoer van elektrisiteit vanaf die nasionale kragvoorsiener (Eskom)?"
  • 'n Maatskappy wat medisyne vervaardig mag vra: "Hoe effektief verlig ons pil hoofpyn?" Daar kan dan aan mense wat die pil gebruik om hoofpyn te verlig, gevra word: "Hoe baie help ons pil om jou hoofpyn weg te neem?" Die maatskappy kan dan op grond van mense se antwoorde bepaal hoe effektief hul produk is.
  • 'n Motormaatskappy wil hulle kliëntediens verbeter en kan dan aan kliënte vra: "Hoe kan ons ons kliëntediens verbeter?"
  • 'n Supermarkbestuurder mag vra: "Watter tipes gaskoeldrank moet ek in my supermark in voorraad hê?" Daar mag dan miskien aan klante gevra word: "Wat is jou gunsteling gaskoeldrank?" Die klante se keuse of voorkeur is 'n voorbeeld van kwalitatiewe data.

Questions & Answers

what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
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Source:  OpenStax, Siyavula textbooks: wiskunde (graad 10) [caps]. OpenStax CNX. Aug 04, 2011 Download for free at http://cnx.org/content/col11328/1.4
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