A quality control engineer selects the first 1400 light bulbs that are produced.

Question

A quality control engineer selects the first 1400 light bulbs that are produced. Does this sampling plan result in a random sample? Simple random sample? Does this sampling plan result in a 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 each group of n items does not have an equal chance of being selected. D. Yes, because each group of n items has an equal chance of being selected. Does this sampling plan result in a simple random sample? A. Yes because each item has an equal chance of being selected B. No, became each item does not have an equal chance of being selected. C. Yes, because each group of n items has an equal chance of being selected. D. No because each group of n items does not have an equal chance of being selected.

Explanation / Answer

It is not a random sample beacuse each item does not have equal chance of being selected. So the correct answer to the first question is (A)

It is not a simple random sample because each group of n items does not have an equal chance of being selected.. So the correct answer to the second question is (B)

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