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Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
Please use typing and answer all questions as from one subpart.
![An officer was appointed by the Malaysia Energy Commission to study the
difference between old and new electricity meter for Malaysia households. He
collected the electric usage before and after changing the electricity meter
from 2000 households in Perak and Selangor. The summary of the data is
shown by the histograms and box plats below.
Electric Usage for New and Old meter
160 200 240 280 320 360 400
New
Old
140-
120-
100-
80-
60-
40-
20-
160 200 240 280 320 360 400
Electric Usage
Panel variable: Meter
Electric Usange for old and new meter
450-
400-
350-
300-
250-
200-
150-
New
oid
Meter
(i)
State the population of the above study. Hence, comment on the error
of the above sample.
(ii)
State the variable(s) of the above study. Provide the type of data and
level of the measurement of the variable(s).
aben pg
-Aɔuanbay](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff609b7c5-1d1b-4314-b215-4136b1bef067%2F3ca521cc-3e2e-4ebe-8003-08be8da0c27e%2F5ohzr5d_processed.jpeg&w=3840&q=75)
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