FOREWARD
First of all, I would like to say Alhamdulillah, for
giving me the strength and health to do this project work. Not forgotten my
parents for providing everything, such as money, to buy any thing that are
related to this project work and their advice, which is the most needed for
this project. Internet, books, computers, and etc. They also supported me and
encouraged me to complete this task so that I will not procrastinate in doing
it. Then I would like to thank my teacher, Encik Mohd Rozali bin Senik for
guiding me and my friends throughout this project. We had some difficulties in doing
this task, but he taught us patiently until we knew what to do. He tried and
tried to teach us until we understand what we supposed to do with the project
work. Last but not least, my friends who were doing this project with me and
sharing our ideas. They were helpful that when we combined and discussed
together, we had this task done.
OBJECTIVE
We
students taking Additional Mathematics are required to carry out a project work
while we are in Form 5. This year the Curriculum Development
Division, Ministry of Education has prepared four tasks for us. We are to
choose and complete only ONE task based on our area of interest.
This project can be done in groups or individually, but each of us are expected
to submit an individually written report. Upon completion of the Additional
Mathematics Project Work, we are to gain valuable experiences and able to:
·
Apply
and adapt a variety of problem solving strategies
to solve routine and non-routine problems;
·
Experience
classroom environments which
are challenging, interesting and meaningful and hence improve
their thinking skills.
·
Experience
classroom environments where knowledge and skills
are applied in meaningful ways in solving real-life problems
·
Experience
classroom environments where expressing ones mathematical thinking ,reasoning
and communication are highly encouraged and expected
·
Experience
classroom environments that stimulates and enhances effective learning.
·
Acquire
effective mathematical communication through oral and writing, and to
use the language of mathematics to express mathematical ideas correctly and
precisely
·
Enhance
acquisition of mathematical knowledge and skills through problem-solving in ways
that increase interest and confidence
·
Prepare
ourselves for the demand of our future undertakings and in workplace
·
Realise
that mathematics is an important and powerful tool in
solving real-life problems and hence develop positive attitude towards
mathematics.
·
Train
ourselves not only to be independent learners but also
to collaborate, to cooperate, and to share knowledge in an engaging
and healthy environment
·
Use
technology especially the ICT appropriately and effectively
·
Train
ourselves to appreciate the intrinsic values of mathematics and to become more creative
and innovative
·
Realize
the importance and the beauty of mathematics
HISTORY OF INDEX NUMBER
Index numbers are meant to study the change in the
effects of such factors which cannot be measured directly.
According to Bowley, “Index numbers are used to measure the changes in some quantity
which we cannot observe directly”. For example, changes in business activity in
a country are
not capable of direct measurement but it is possible to
study relative changes in business activity by studying the variations in
the values of some such factors which affect business activity, and which are capable of direct measurement. Index
numbers are commonly used statistical device for measuring the
combined fluctuations in a group related variables. If we
wish to compare the price level of consumer items today with that prevalent
ten years ago, we are not interested in comparing the prices of only one item,
but in comparing some sort of average price levels. We may wish to compare the
present agricultural production or industrial production with that at the time
of independence. Here again, we have to consider all items of
production and each item may have undergone a different fractional
increase (or even a decrease). How do we obtain a composite measure? This
composite measure is provided by index numbers which may be defined
as a device for combining the variations that have come in group of
related variables over a period of time, with a view to obtain a figure
that represents the ‘net’ result of the change in the constitute variables.
Index numbers may be classified in
terms of the variables that they are intended to measure. In business,
different groups of variables in the measurement of which index
number techniques are
commonly used are (i) price, (ii) quantity, (iii) value and (iv) business
activity. Thus, we have index of wholesale
prices, index of consumer prices, index of industrial output, index of value of
exports and index of business activity, etc. Here we shall be mainly interested
in index numbers of prices showing changes with respect to time, although
methods described can be applied to other cases. In general, the
present level of prices is compared with the level of prices in the past.
The present
period is called the current period and some period in the past is called the base
period.
Index Numbers:
Index numbers are
statistical measures designed to show changes in a variable or group of related
variables with respect to time, geographic location or other characteristics
such as income, profession, etc. A collection of index numbers for different years,
locations, etc., is sometimes
called an index series.
Simple Index Number:
A simple index number is a number that
measures a relative change in a single variable with respect to a base.
Composite Index Number:
A composite index number
is a number that measures an average relative changes in a group of relative
variables with respect to a base.
PART 1
The price of goods sold in shop vary from one shop
to another. Shoppers tend to
buy goods which are not only reasonably price but also give value for their
money.
You are required to carry out a survey on
four different items based on the following categories: food, detergent
and stationery. The survey should be done in three different shop.
Part 1(a)
Collect picture, newspaper cuttings or photos on item
that you have chosen. Design a collage to illustrate the chosen item.
FOOD
STATIONERY
DETERGENT
Part 1(b)
Record the item and their
prices systematically as such in Table 1. Since item may be differently
packed, be sure to use consistent measurements for each item selected so
that comparison can be done easily and accurately.
The
data in the table below is only serve as a REFERENCE to you:
Category
|
Item
|
Mydin
|
Eng
Hong
|
Nirwana
|
|
Nasi
Lemak
|
1.00
|
1.50
|
2.00
|
Food
|
Curry
puff
|
0.50
|
0.50
|
0.50
|
|
Teh
tarik
|
1.00
|
1.20
|
1.30
|
|
Total Price
|
2.50
|
3.20
|
3.80
|
|
Glue
|
0.90
|
0.80
|
0.80
|
Stationery
|
Pen
|
1.90
|
1.20
|
1.30
|
|
Eraser
|
0.70
|
0.50
|
0.40
|
|
Total Price
|
3.50
|
2.50
|
2.50
|
|
Dynamo
|
4.00
|
4.30
|
4.50
|
Detergent
|
Kuat
Harimau
|
5.20
|
5.50
|
5.80
|
|
Soflan
|
4.20
|
4.50
|
4.70
|
|
Grand Total
|
19.40
|
20.00
|
21.30
|
Part 1(c)
Create at least two
suitable graphical representations (the use of ICT is encouraged) to compare
contrast the price of the item chosen.
Part 1 (d):
Based on the graphical representations
that you have constructed in part 1(c), interpret,discuss and draw
consclusion. Comment on your findings.
Based on the graphical representations that I have
constructed in Part 1(c), it is shown that there are large and small
differences among the prices of items in each category between the shops.
In the food category, the smallest price difference are of those of curry puffs,
while the highest
is the price of Nasi Lemak. Besides food, stationery also
shows a smallest price. On the other
hand,
detergent shows a highest price difference between its
items. The graph also show that most of the items that are high priced
comes from the Nirwana Supermarket, while the lowest price items come from the
Mydin Supermarket. The graph 1(d) will show the conclusion of the difference
among the shops based upon the shops grand total.
Graph 1(d)
Part 1(e)
Identify an
item that has large price difference among the shops. Suggest anddiscuss
possible reasons for the price difference.
Kuat Harimau : Mydin – 5.20
Eng Hong – 5.50
Nirwana – 5.80
Mean = (5.20 + 5.50
+ 5.80) ÷ 3
=
5.50
Standard deviation :
σ =
= TOLONG KIRAKAN
Reason of
difference in price :
·
Bulk buying from
the retailer gives the lower cost :
resulted
in lower relling price.
·
Hypermarket own
brands are much cheaper than the expansive brand-don’t involve in advertiving
:
resulted
in lower –selling price
·
Sales and
discount offer by the supermarket.
FUTHER EXPLORATION
Index numbers are being used in many different daily situations, for example, air pollution
index, stock market index, gold index and property index.
Obtain information from the internet or other reliable sources on the importance of two different types of index numbers of your
choice. Elaborate the use and the importance of these index numbers in daily life situations.
1. AIR
QUALITY INDEX
An air quality index (AQI) is a number used by government agencies to communicate to the public how polluted the air is
currently or how polluted it is forecast to become. As the AQI increases, an
increasingly large percentage of the population is likely to experience increasingly
severe adverse health effects. Different countries have their own air quality indices
which are not all consistent. Different countries also use different names for
their indices such as Air Quality Health Index, Air Pollution Index and Pollutant Standards Index.
Definition and
Usage :
Air quality is
defined as a measure of the
condition of air relative to the requirements of one or more biotic species or to any
human need or purpose. To compute the AQI requires an air pollutant
concentration from a monitor or model. The function used to convert from air
pollutant concentration to AQI varies by pollutant, and is different in
different countries. Air quality index
values are divided into ranges, and each range is assigned a descriptor and a
colour code. Standardized public health advisories are associated with each AQI
range.
The AQI can go
up (meaning worse air quality) due to a lack of dilution of
air pollutants. Stagnant air, often caused by an anticyclone, temperature inversion ,or low wind speeds lets
air pollution remain in a local area,
leading to high concentrations of pollutants and hazy conditions. An agency might encourage members of the
public to take public transportation or work from home when AQI levels are high.
Most air
contaminants do not have an associated AQI. Many countries monitor ground-level ozone ,particulates ,sulphur dioxide, carbon monoxide and nitrogen dioxide and calculate
air quality indices for these pollutants.
Indices by Location :
Hong
Kong
The Air Pollution Index
(API) levels for Hong Kong are related to the measured concentrations of
ambient respirable suspended particulate (RSP), sulphur dioxide (SO2),carbon
monoxide (C2), ozone (O3) and nitrogen dioxide (NO2) over a 24-hour
period based on the potential health effects of air pollutants.
An API level at or below
100 means that the pollutant levels are in the satisfactory range over 24
hour period and pose no acute or immediate health effects. However,
air pollution consistently at "High" levels (API of 51 to
100) in a year may mean that the annual Hong Kong "Air Quality
Objectives" for protecting long-term health effects could be
violated. Therefore, chronic health effects may be observed if one is
persistently exposed to an API of 51 to 100 for a long time.
"Very High"
levels (API in excess of 100) means that levels of one or more
pollutant(s)is/are in the unhealthy range. The Hong Kong Environmental
Protection Department provides advice to the public regarding
precautionary actions to take for such levels.
API
|
Air Pollution Index
|
Health Implications
|
0-25
|
Low
|
None expected
|
26-50
|
Medium
|
None expected for the general population.
|
51-100
|
High
|
Acute health
effects are not expected but chronic effects may be
observed if one is persistently
exposed to such levels.
|
101-200
|
Very High
|
People with existing heart
or respiratory illnesses may notice mild aggravation of their health
conditions. Generally healthy individuals may also notice some
discomfort.
|
201-500
|
Severe
|
People with existing heart or
respiratory illnesses may experience significant
aggravation of their
symptoms. There may also be widespread
symptoms in the healthy population(e.g. eye irritation, wheezing, coughing,
phlegm and sore throats).
|
Canada
Air quality in Canada has been reported for many
years with provincial Air Quality Indices (AQIs). Significantly, AQI values
reflect air quality management objectives, which are
based on the lowest achievable emissions rate, and not exclusively concern
for human health. The Air Quality Health Index or (AQHI) is a scale
designed to help understand the impact of air quality on health. It is a health protection tool used
to make decisions to reduce short-term exposure to air pollution by adjusting
activity levels during increased levels of air pollution. The Air
Quality Health Index also provides advice on how to improve air quality by
proposing behavioural change to reduce the environmental footprint. This index
pays particular attention to people who are sensitive to air pollution. It
provides them with advice on how to protect their health during air quality
levels associated with low, moderate, high and very high health risks.
The Air Quality Health Index provides a
number from 1 to 10+ to indicate the level of health risk associated with local air quality. On
occasion, when the amount of air pollution is abnormally high, the number may exceed 10. The
AQHI provides a local air quality current value as well as a local air quality maximums
forecast for today, tonight, and tomorrow, and provides
associated health advice.
Health Risk
|
Air Quality Health Index
|
Health Messages
|
|
|
|
At
Risk Population
|
*General
Population
|
Low
|
1-3
|
Enjoy
your usual outdoor activities
|
Ideal
air quality for outdoor activities
|
Moderate
|
4-6
|
Consider reducing or rescheduling strenuous activities outdoors if you are experiencing symptoms.
|
No need to modify
your usual outdoor
activities unless you experience symptoms
such as coughing and throat irritation.
|
High
|
7-10
|
Reduce
or reschedule
strenuous activities outdoors. Children and the elderly should also take
it easy.
|
Consider reducing
or rescheduling
strenuous activities outdoors if you experience symptoms such as
coughing and throat irritation.
|
Very High
|
Above 10
|
Avoid
strenuous activities
outdoors. Children and the elderly should also avoid outdoor physical
exertion.
|
Reduce
or reschedule
strenuous activities outdoors,
especially if you experience symptoms such as coughing and throat
irritation.
|
Singapore
Singapore uses the Pollutant
Standards Index to report on its air quality, with details
of the calculation similar but not identical to that used in Malaysia and
Hong Kong. The PSI chart below is grouped by index values and descriptors,
according to the National Environment
Agency.
PSI
|
Descriptor
|
General Health Effects
|
0-50
|
|
None
|
51-100
|
Moderate
|
Few or none for the general population
|
101-200
|
Unhealthy
|
Mild aggravation of symptoms among
susceptible persons i.e. those with underlying
conditions such as chronic
heart or lung ailments; transient symptoms of irritation e.g. eye irritation,
sneezing or coughing in some of the
healthy population.
|
201-300
|
Very Unhealthy
|
Moderate
aggravation of symptoms and decreased tolerance in
persons with heart or lung disease; more widespread symptoms of
transient irritation in the
healthy population.
|
301-400
|
Hazardous
|
Early onset of certain
diseases in addition to significant aggravation
of symptoms in susceptible persons; and decreased exercise
tolerance in healthy
persons.
|
Above 400
|
Hazardous
|
PSI levels above 400 may be life-threatening to ill and elderly persons. Healthy people may experience
adverse symptoms that affect normal activity.
|
2.BODY MASS
INDEX
The body mass index(BMI), or Quetelet
index, is a measure for human body shape based on an individual's
weight and height. It was devised between 1830 and 1850 by the Belgian polymath Adolphe
Quetelet during the
course of developing "social physics". Body mass index is
defined as the individual's body mass divided by the square of their height. The formulae
universally used in medicine produce a unit of measure of kg/m². BMI can also be determined using a BMI chart, which displays BMI as a
function of weight (horizontal axis) and height (vertical axis) using contour
lines for different values of BMI or colours for different BMI categories.
The factor for UK/US units is more precisely
703.06957964, but that
level of precision is not meaningful for this calculation. To
work from stone and pounds first multiply
the stone by 14 then add the pounds to give the whole mass in pounds; to work
from feet and inches first multiply the feet by 12 then add the inches to give
the whole height in inches.
Usage :
While the formula previously called the Quetelet Index for BMI dates to the
19thcentury, the new term "body mass index" for the ratio and its
popularity date to a paper published in the July edition of 1972 in the Journal of Chronic Diseases
by Ancel Keys, which found the BMI to
be the best proxy for body fat percentage among ratios of weight and height;
the interest in measuring body fat being due to obesity becoming a discernible issue
in prosperous Western societies. BMI was explicitly cited by
Keys as being appropriate for population studies, and inappropriate for
individual diagnosis. Nevertheless, due to its simplicity, it came to be
widely used for individual diagnosis, despite its inappropriateness.
BMI provided a simple numeric measure of a
person's thickness or thinness,
allowing health professionals to discuss overweight and underweight problems
more objectively with their patients. However, BMI has become controversial
because many people, including physicians, have come to rely on its apparent
numerical authority for medical diagnosis, but that was never the BMI's
purpose; it is meant to be used as a simple means of classifying sedentary
(physically inactive) individuals, or rather, populations, with an average body
composition. For these individuals, the current value settings are as follows: a BMI of 18.5 to 25 may indicate optimal weight; a BMI
lower than 18.5 suggests the person is underweight while a number above 25 may
indicate the person is overweight; a person may have a BMI
below 18.5 due to disease; a number above 30 suggests the
person is obese(over 40, morbidly obese).
For a given height, BMI is proportional to mass.
However, for a given mass, BMI is inversely proportional to the square of the height. So, if all body
dimensions double and mass scales naturally with the cube of the height, then
BMI doubles instead of remaining the same. These results in taller people
having a reported BMI that is uncharacteristically high compared to their
actual body fat levels. In comparison, the Ponderal index is based on this natural
scaling of mass with the third power of the height. However, many
taller people are not just "scaled up" short people, but
tend to have narrower frames in proportion to their
height.
BMI Prime :
BMI Prime, a simple modification of the BMI system, is the
ratio of actual BMI to upper limit BMI (currently defined at BMI 25). As
defined, BMI Prime is also the ratio of body
weight to upper body weight limit, calculated at BMI 25. Since it is the
ratio of two separate BMI values, BMI Prime is a dimensionless number, without
associated units. Individuals with BMI Prime less than 0.74 are underweight;
those between 0.74 and 1.00have optimal weight; and those at 1.00 or greater
are overweight. BMI Prime is useful clinically because individuals can tell, at a glance, by what
percentage they deviate from their upper weight limits. For instance, a person
with BMI 34 has a BMI Prime of 34/25 =1.36, and is 36% over his or her upper
mass limit. In South East Asian populations (see international variation
section below) BMI Prime should be calculated using an upper limit BMI of
23 in the denominator instead of 25. Nonetheless, BMI Prime allows easy comparison
between populations whose upper limit BMI values differ.