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Sample of Checking Randomly

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An analyst processes one item every 30 minutes, so 80 items are completed in her first day of work. Her manager checks her work by randomly selecting an hour of the day, then reviewing all the items she completed that hour. Does this sampling plan result in a random sample? Simple random sample?

(A) No, because each item does not have an equal chance of being selected
(B) Yes, because each item has an equal chance of being selected
(C) No, because all possible groups of n items do not have an equal chance of being selected.
(D) Yes, because all possible groups of n items have an equal chance of being selected.
Does the sampling plan result in a simple random sample?
(A) No, because all possible groups of n items do not have an equal chance of being selected.
(B) Yes, because each item has an equal chance of being selected
(C) Yes because all possible groups of n items have an equal chance of being selected
(D) No because each item does not have an equal chance of being selected.

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Solution Summary

Briefly answers whether a sampling plan is a random simple sample or not and why.

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Does this sampling plan result in a random sample?
Answer: (D) Yes, because all possible groups of n ...

Solution provided by:
Amrit Lal Ahuja, PhD (IP)
Education
  • BEng, Allahabad University, India
  • MSc , Pune University, India
  • PhD (IP), Pune University, India
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