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Dear sir,
Could you tell me whether my understanding about systematic selection is correct?
The population is about 10 invoices
I want to look at 5 of them
So the interval will be 10/5=2
the random generation shows I should select number 4 invoice as starting point.
Then the next one will be number 6, etc.
the selected samples: 4,6,8,10 and 2
Thanks in advance!!
Kinda right, though with 10 invoices you would look at all! However, correct in principle.
Change your figures to be:
Population = 10,000
Look at 20
Look at every 10,000/20 = 500th
Choose first one at random then count through 500 until the next.
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