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3.3 How many people in a particular province are HIV positive?

3.4 How does the prison population of one province compare with that of another province?

3.5 When one looks at the number of women in our parliament, how does that compare with the situation in other democratic countries?

3.6 What is the distribution of wealth in the world – in other words, what percentage of the world’s population owns, say, half of the world’s wealth?

ACTIVITY 2

To learn about using various methods for gathering data

[LO 2.2, 5.2]

In the research about the cell phones and sport, it was easy to get information. But sometimes one has to work a little harder.

1 When one has to count something (for example, the number of lefthanders in the school), the easiest way is to use a tally table

  • Below is a tally table for filling in information about the ages and sex (male or female) of you and your siblings (brothers and sisters). For each sister, you make a little line (a tally) in the “sisters” row under the appropriate age. For each brother you do the same in the “brothers” row. Don’t forget yourself! Every learner in the class must do the same. Every time you have to add a fifth tally, you put it across the four others – this makes it easier to add all the tallies at the end to get the totals for each age. The first tally table shows an imaginary e x ample – you will use the second one for your class.
Ages <1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 >24
Sisters
Bro­thers
Total sisters
Total brothers
  • The numbers in the bottom two rows give the frequency of the occurrence of the different ages. A frequency table shows the frequency distribution of the characteristic being studied.
  • You can see that the tables in the cell phone and sport examples are also frequency tables.

2 Questionnaires are used when the information to be gathered is more complicated than can be entered on a tally table

  • Someone might stop you in a shopping centre and interview you about your toothpaste and flossing habits.
  • The questionnaire form might have questions like:
  • Do you use toothpaste never, once, twice or more than two times a day?
  • Do you buy a new toothbrush every week, every month or every year?
  • Do you floss your teeth regularly or only when you think you have food stuck in your teeth?
  • Do you prefer flavoured toothpaste?
  • Do you like coloured toothpaste?
  • Do you go the dentist regularly or only when necessary?
  • How many fillings have you had?
  • Have you had any teeth extracted?
  • Form small groups and briefly discuss some of the possible reasons why someone might want this information.
  • Many questionnaires are printed in newspapers and magazines. Sometimes they are just for fun, and you can analyse them and read the results right away. But some can be serious, and you might be asked to post them back. Often, to encourage people to participate, a prize or reward might be offered! Many people hate filling in questionnaires, and they have to be persuaded – but for others it is great fun and they don’t mind being helpful.

3 Another way of getting information is to do an experiment.

Questions & Answers

what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
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 did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Mathematics grade 9. OpenStax CNX. Sep 14, 2009 Download for free at http://cnx.org/content/col11056/1.1
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