<< Chapter < Page Chapter >> Page >

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

differentiate between demand and supply giving examples
Lambiv Reply
differentiated between demand and supply using examples
Lambiv
what is labour ?
Lambiv
how will I do?
Venny Reply
how is the graph works?I don't fully understand
Rezat Reply
information
Eliyee
devaluation
Eliyee
t
WARKISA
hi guys good evening to all
Lambiv
multiple choice question
Aster Reply
appreciation
Eliyee
explain perfect market
Lindiwe Reply
In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
Ezea
What is ceteris paribus?
Shukri Reply
other things being equal
AI-Robot
When MP₁ becomes negative, TP start to decline. Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Kelo
yes,thank you
Shukri
Can I ask you other question?
Shukri
what is monopoly mean?
Habtamu Reply
What is different between quantity demand and demand?
Shukri Reply
Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
Ezea
ok
Shukri
how do you save a country economic situation when it's falling apart
Lilia Reply
what is the difference between economic growth and development
Fiker Reply
Economic growth as an increase in the production and consumption of goods and services within an economy.but Economic development as a broader concept that encompasses not only economic growth but also social & human well being.
Shukri
production function means
Jabir
What do you think is more important to focus on when considering inequality ?
Abdisa Reply
any question about economics?
Awais Reply
sir...I just want to ask one question... Define the term contract curve? if you are free please help me to find this answer 🙏
Asui
it is a curve that we get after connecting the pareto optimal combinations of two consumers after their mutually beneficial trade offs
Awais
thank you so much 👍 sir
Asui
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
Suppose a consumer consuming two commodities X and Y has The following utility function u=X0.4 Y0.6. If the price of the X and Y are 2 and 3 respectively and income Constraint is birr 50. A,Calculate quantities of x and y which maximize utility. B,Calculate value of Lagrange multiplier. C,Calculate quantities of X and Y consumed with a given price. D,alculate optimum level of output .
Feyisa Reply
Answer
Feyisa
c
Jabir
the market for lemon has 10 potential consumers, each having an individual demand curve p=101-10Qi, where p is price in dollar's per cup and Qi is the number of cups demanded per week by the i th consumer.Find the market demand curve using algebra. Draw an individual demand curve and the market dema
Gsbwnw Reply
suppose the production function is given by ( L, K)=L¼K¾.assuming capital is fixed find APL and MPL. consider the following short run production function:Q=6L²-0.4L³ a) find the value of L that maximizes output b)find the value of L that maximizes marginal product
Abdureman
types of unemployment
Yomi Reply
What is the difference between perfect competition and monopolistic competition?
Mohammed
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Siyavula textbooks: wiskunde (graad 10) [caps]. OpenStax CNX. Aug 04, 2011 Download for free at http://cnx.org/content/col11328/1.4
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Siyavula textbooks: wiskunde (graad 10) [caps]' conversation and receive update notifications?

Ask