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Wiskunde

Graad 9

Getalpatrone

Grafiese voorstellings

Vergelykings

Statistiek

Waarskynlikheidsleer

Module 17

Versamel inligting om algemene vrae te beantwoord

Vir wie is statistieke nou eintlik belangrik?

AKTIWITEIT 4.1

Om te besef dat ons inligting moet insamel om algemene vrae te kan beantwoord

LU 5.1]

Dis dikwels noodsaaklik om inligting oor mense te hê. Byvoorbeeld, as die regering moet besluit hoeveel nuwe skole waar gebou moet word, moet hulle weet hoeveel kinders daar in elke streek van die land woon, veral kinders wat nog nie skoolgaan nie. Dieselfde geld vir besluite oor nuwe klinieke, hospitale, ensovoorts.

Mense wat ’n nuwe produk wil bemark, wil graag weet hoeveel mense sou belangstel om die produk te koop. Om ’n antwoord te kry, moet hulle vrae vra en statistieke bekom.

Statistici is die professionele mense wat hierdie werk doen. Hulle sien toe dat die inligting wat ingesamel word, die beste moontlik is (ons sal later meer hieroor leer). Dan bestudeer en bewerk hulle die data sodat betroubare besluite daarop gebaseer kan word.

Die regering hou ’n sensus op ’n gereelde grondslag om inligting oor die land se bevolking te bekom. Dan word heelwat ekstra mense in diens geneem om die besonderhede van elke persoon in die land in te samel. Dit neem dan nog ’n paar jaar om al die inligting te organiseer en te publiseer. Die inligting word dan vrygestel vir gebruik deur diegene wat beplanning op grond van betroubare syfers moet doen.

Die grondslag van die statistiek is syfers, en dié word verkry deur vrae. Kom ons doen gou ’n bietjie navorsing.

Belangrik : Hou al die inligting waaraan ons werk in hierdie deel – ons gaan dit later weer gebruik. Soos jy meer leer van statistiek, sal jy meer inligting uit die data kan aflei.

  1. Dink aan jou hele familie – ouers, grootouers, broers en susters, tantes, ooms – almal. Tel hoeveel familielede jy het. Hoeveel van hulle het selfone? Hoeveel van hulle se selfone is al gesteel? Hoeveel het al hulle selfone verloor? Vul die inligting in op die tabel, en in die laaste reël die totale vir die hele klas.
Aantal mense Besit selfoon Selfoon al gesteel Selfoon al verloor
Leerder
Klas

2 Werk drie of vier saam in groepies om die volgende tabel te voltooi. Elkeen skryf neer aan watter twee sportsoorte hy/sy besonder graag sou wou deelneem. Dit hoef nie skoolsport te wees nie. Vir elke sport vul jy in of jy dit alreeds speel, of jy in ’n span speel en of jy dit nie kan speel nie weens ’n gebrek aan fasiliteite en toerusting of omdat daar nie ’n afrigter is nie.

3 Hier is nog ’n paar van die soort vrae waarmee statistici hulle besig hou:

3.1 Hoe verteenwoordigend is die leerders in ’n skool van die bevolking van die streek waar die skool geleë is?

3.2 Wat is die houding van mense wat in ’n sekere area woon jeens die verklaring van ’n deel van die area as ’n natuurbewaringsomgewing?

3.3 Hoeveel mense in ’n sekere provinsie is HIV-positief?

3.4 Hoe vergelyk die gevangenisbevolking van twee gegewe provinsies?

3.5 Suid-Afrika het heelwat vrouens in die parlement. Hoe vergelyk dit met ander demokratiese lande?

Questions & Answers

how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Micheal Reply
Binomial nomenclature
adeolu
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Source:  OpenStax, Wiskunde graad 9. OpenStax CNX. Sep 14, 2009 Download for free at http://cnx.org/content/col11055/1.1
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