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Kwantitatiewe data

  • 'n Maatskappy wat selfone vervaardig mag moontlik data versamel oor hoe dikwels mense nuwe selfone koop en watter faktore hul besluit beïnvloed. Sodoende kan die selfoonmaatskappy bepaal op watter fasiliteite en eienskappe hulle moet fokus om hul produk meer aantreklik te maak vir kopers.
  • 'n Lid van die stadsraad wil moontlik weet hoeveel ongelukke by 'n spesifieke padkruising gebeur om te besluit waar verkeersligte opgerig moet word. Die raadslid kan dan die plaaslike polisiekantoor besoek en hul rekords nagaan om die nodige data te bekom.
  • 'n Supermarkbestuurder mag vra: "Watter tipes gaskoeldrank moet ek in my supermark in voorraad hê?" Daar mag dan aan klante gevra word: "Wat is jou gunsteling gaskoeldrank?" Op grond van hoeveel mense 'n spesifieke gaskoeldrank verkies, kan die bestuur dan 'n ingeligte besluit neem van watter gaskoeldrank om aan te hou.

Dit is belangrik om daarop te let dat verskillende vrae, verskillende fasette van die 'n situasie na vore bring en dat dit die begrip van die situasie sal beïnvloed. Byvoorbeeld, die eerste vraag op die lys kan geformuleer word om te vra: "Het jou huis elektrisiteit?". Indien die gebruiker "Ja" antwoord hierop, terwyl hy krag van sy buurman af herlei, sal dit die verkeerde indruk gee dat die betrokke persoon nie krag nodig het van die amptelike verskaffer nie.

Metodes van dataversameling

Die metode of strategie van dataversameling moet ooreenstem met die vrae wat gevra word. 'n Paar voorbeelde van dataversamelingsmetodes is:

  1. Vraelyste, meningspeilings en onderhoude
  2. Eksperimente
  3. Ander bronne (vriende, familie, koerante, boeke, tydskrifte en die Internet)

Die belangrikste aspek van elke metode van dataversameling is om die vrae wat beantwoord moet word duidelik te formuleer. Die tipe dataversamelingsmetode moet gekies word om by jou vrae te pas.

Byvoorbeeld vraelyste, meningspeilings en onderhoude sal die beste pas by die vrae in die voorbeelde in "Die Doelwit van die Versameling van Primêre Data" .

Steekproef en bevolking (populasie)

Voordat daar begin word met die datainsameling is dit belangrik om te besluit hoeveel data nodig is sodat die resultate 'n verteenwoordigende aanduiding sal gee van die antwoord op 'n sekere vraag. In die ideale geval sal die studie so ontwerp word dat die maksimum hoeveelheid inligting verkry word met die minimum hoeveelheid moeite. Die konsepte bevolking en steekproef is baie belangrik ten einde die energie- en koste-uitset so min as moontlik te hou.

Die volgende terme behoort bekend te wees:

  • beskryf die hele groep wat in die studie in ag geneem word. Byvoorbeeld, as jy wil weet hoeveel leerders in jou skool in die winter verkoue gekry het, dan sal jou bevolking al die leerders in jou skool wees.
  • beskryf 'n groep wat gekies word om die bevolking te verteenwoordig. Byvoorbeeld, vir die opname oor verkoue in die skool kan jy miskien net 'n paar leerders kies - byvoorbeeld een uit elke klas.
  • beskryf 'n steekproef wat op so manier uit die bevolking gekies word dat elke lid van die bevolking 'n gelyke kans het om gekies te word.

Questions & Answers

do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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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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