An engineer wants to obtain a random sample of the output of a process manufactu

Question

An engineer wants to obtain a random sample of the output of a process manufacturing digital cameras, that have a production schedule of 1000 camera per week, from Monday to Friday from 8 AM-to-4 PM. She samples on FIVE different days during a month, and on each day she selects twenty cameras at random between 8 AM, and 4 P.M. from the production line output. Is this a fair or unfair random sample, a retrospective or observational study? Please select the best answer Yes, the sample is a random sample and it is observational study Yes, the sample is a random sample and it is retrospective study No, the sample is a random sample and it is observational study No, the sample is a random sample and it is retrospective study

Explanation / Answer

Answer:

No, the sample is not a random sample and it is observational study.

Note: the days are not selected at random.

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