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Grade 9

Number patterns, graphs, equations,

Statistics and probability

Module 17

Collect information to answer general questions


To learn that we must collect information to be able to answer general questions

[LO 5.1]

It is useful to have information about people. For instance, if the government has to decide how many new schools to build and where to build them, then they need to know how many children there are in every region of the country, especially children who are not yet attending schools. The same applies for decisions about building new clinics and hospitals, and so on.

People who want to market a new product will want to know how many people would be interested in buying their product. For this they need to ask questions and obtain statistics.

The professionals who work in this field are called statisticians. It is their job to see that the information that is gathered is the best possible (we will learn more about this later). They then study and manipulate the data so that sensible decisions can be based on them.

The basis of statistics is figures, which are obtained from asking questions. We are going to do some quick research.

The government organises a census from time to time to obtain information about the population. At that time many extra people are employed to gather the details of every person in the country. It usually takes a few years to organise all the information and to publish it. The information is then made public so that it can be used by people who need to plan on the basis of accurate figures.

Important note : Please keep any information that you work on in this section – we will use it again later. As you learn how to work with statistics, we will get more and more information from your data.

  1. Think about your whole family – parents, grandparents, siblings (brothers and sisters), aunts, uncles – everybody. Count how many e x tended family members you have. How many of them have cell phones? How many of them have had cell phones stolen? How many of them have lost their cell phones? Fill the information in on the following table, and in the last row fill in the totals for the whole class
Number of people Owns a cell phone Has had cell phone stolen Has lost cell phone

2 Work in groups of three or four. Each must write down two sports that they would particularly like to take part in. These sports need not be school sports. For each of the sports, they must say whether they already play it, whether they are members of a team or whether they can’t play it because they don’t have access to facilities and equipment or don’t have access to a coach. Again, fill the information for your group in on the table.

3 Here are some more of the type of questions that statisticians might work on:

3.1 How representative are the learners in a particular school of the population of the area where the school is?

3.2 What are the attitudes of the people living in a certain region to the proclamation of a part of the area as a wildlife preservation area?

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
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.
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
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
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.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket 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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