ExpertEasy2 marksMultiple Choice
ACCA · Question 03 · Data Analysis and Statistical Techniques
Section A
MetroWater, a public utility company, uses sampling to test water quality. An automated system selects every 50th water sample passing through the main filtration valve for detailed chemical analysis. Which sampling method is being utilized?
Section A
MetroWater, a public utility company, uses sampling to test water quality. An automated system selects every 50th water sample passing through the main filtration valve for detailed chemical analysis. Which sampling method is being utilized?
Answer options:
A.
Random sampling
B.
Stratified sampling
C.
Systematic sampling
D.
Cluster sampling
How to approach this question
Identify the key phrase 'every 50th water sample'. A regular interval selection is the definition of systematic sampling.
Full Answer
C.Systematic sampling✓ Correct
Systematic sampling is a statistical method involving the selection of elements from an ordered sampling frame. The most common form is an equiprobability method, where every kth element is selected.
Common mistakes
Selecting random sampling because the process is 'automated'.
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