Determine wether the sample described below is a simple random sample A quality

Question

Determine wether the sample described below is a simple random sample

A quality control engineer selects every 6000th hairdryer that is produced

Does this sampling plan result in a simple random sample?

A The sample is not a simple random sample bcos each individual hairdryer does not have the same chance of being selected

B The sample is a random sample because each individual hairdryer has the same chance of being selected
C The sample is a simple random sample because every sample of the same size has the same chance of being selected
D The sample is not a simole random sample because every samole of the same size does not have the same chance of being selected

Explanation / Answer

Here only 6000n th hairdryer is being selected. There is no chance that any hairdryer which is between 6000n to 6000(n+1) n=1,2,3.......will be selected. But in the simple random sampling we need to ensure that every sample must have an equal chance of getting selected. But here selection of sample is done on a subjective basis. So it is not a simple random sampling.

So (A) is true

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