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Wiskunde

Meetkunde, datahantering en waarskynlikheid

Datahantering

Opvoeders afdeling

Memorandum

1. 1.1 45

  • 45
  • 41,5

2. 2.1 18 / 13

  • 6

3. 3.1 17 / 19

  • 38

4. 4.1 5,5

  • 13,7

5. 5.1 Klas / Vak

Leerders afdeling

Inhoud

Aktiwiteit: om ongegroepeerde numeriese data te ondersoek en die modus en die mediaan te bepaal [lu 5.5]

Teen hierdie tyd het jy seker al besef dat data op ‘n wye verskeidenheid maniere voorgestel kan word. Kom ons kyk nou hoe data in ‘n skoolsituasie gebruik kan word:

Mnr. Muruvan se klas het ‘n Wiskundetoets van 50 punte geskryf en die resultate van die seuns in die klas het so gelyk:

47 ; 33 ; 45 ; 49 ; 38 ; 45 ; 42 ; 45 ; 30

In plaas daarvan om die data deur middel van ‘n grafiek voor te stel, het mnr. Muruvan die modus, mediaan en rekenkundige gemiddelde bereken.

HET JY GEWEET?

Die modus van die data is die waarde wat die meeste voorkom. Soms is daar meer as een modus.

Die mediaan van die data is die waarde wat in die middel lê wanneer die data van klein na groot gerangskik word. Indien daar ‘n ewegetal waardes is, is die mediaan die gemiddeld van die middelste twee waardes.

Die rekenkundige gemiddelde kry jy as jy al die waardes bymekaar tel en dit dan deel deur die aantal waardes.

1. Kom ons help mnr. Muruvan om die volgende te bepaal:

1.1 Die modus:

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

1.2 Die mediaan:

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

1.3 Die rekenkundige gemiddelde:

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

2. Bepaal nou die modus van:

2.1 18 ; 13 ; 15 ; 18 ; 19 ; 12 ; 13 ; 14

2.2 5 ; 6 ; 6 ; 7 ; 9 ; 8 ; 7 ; 6 ; 8 ; 9

3. Bepaal die mediaan van:

3.1 17 ; 15 ; 23 ; 15 ; 19 ; 29

3.2 41 ; 29 ; 50 ; 33 ; 45 ; 27 ; 38

4. Bepaal die rekenkundige gemiddelde van:

4.1 5 ; 7 ; 8 ; 3 ; 4 ; 9 ; 2 ; 6

4.2 11 ; 14 ; 16 ; 12 ; 13 ; 15 ; 15

5. Beantwoord die volgende vrae:

5.1 Watter rekenkundige gemiddelde bepaal jou opvoeder gereeld?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

5.2 Hoekom?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

Assessering

Leeruitkomste 5: Die leerder is in staat om data te versamel, op te som, voor te stel en krities te ontleed om gevolgtrekkings en voorspellings te maak, en om toevallige variasies te interpreteer en te bepaal.

Assesseringstandaard 5.5: Dit is duidelik wanneer die leerder ongegroepeerde numeriese data ondersoek om die telling (modus) wat die meeste voorkom, en die middelwaarde (mediaan) van die datastel te bepaal, om sodoende sentrale neigings te beskryf.

Questions & Answers

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.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
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
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
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Wiskunde graad 6. OpenStax CNX. Sep 15, 2009 Download for free at http://cnx.org/content/col11072/1.1
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