Sia
Question
Math
Posted 5 months ago
A factory overseer selects 40 threaded rods at random from those produced that week at the factory, then she tests their tensile strength.
Identify the population and sample in this setting.
Choose 1 answer:
(A) The population is all threaded rods ever produced at the factory; the sample is the threaded rods produced that week.
(B) The population is threaded rods produced at the factory that week; the sample is the 40 threaded rods selected.
(C) The population is all threaded rods in the world; the sample is all threaded rods produced at the factory.
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Answer from Sia
Posted 5 months ago
Solution by Steps
step 2
The population is the entire group that we want to study or make inferences about
step 3
The sample is the subset of the population that is actually observed or tested
step 4
According to the scenario, the overseer selects 40 threaded rods from those produced that week at the factory
step 5
The population in this context is the threaded rods produced at the factory that week, since we are interested in the tensile strength of the rods from that specific time period
step 6
The sample is the 40 threaded rods selected at random from the population for testing
B
Key Concept
Population and Sample in Statistics
Explanation
The population is the entire group under study, while the sample is a subset of the population that is collected and observed to make inferences about the population.
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