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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

A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
Aislinn Reply
cm
tijani
what is titration
John Reply
what is physics
Siyaka Reply
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Jude Reply
Can you compute that for me. Ty
Jude
what is the dimension formula of energy?
David Reply
what is viscosity?
David
what is inorganic
emma Reply
what is chemistry
Youesf Reply
what is inorganic
emma
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
Krampah Reply
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
Sahid Reply
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
Samuel Reply
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Joseph Reply
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
Ryan
what's motion
Maurice Reply
what are the types of wave
Maurice
answer
Magreth
progressive wave
Magreth
hello friend how are you
Muhammad Reply
fine, how about you?
Mohammed
hi
Mujahid
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
yasuo Reply
Who can show me the full solution in this problem?
Reofrir 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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