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Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
1st Edition
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:HOUGHTON MIFFLIN HARCOURT
Chapter9: Solving Quadratic Functions
Section: Chapter Questions
Problem 4CA
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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
Transcribed Image Text: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
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