SOLUTION: To estimate the percentage of defects in a recent manufacturing batch, a quality-control manager selects every twentieth widget that comes off the assembly line, starting with the

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Question 1037035: To estimate the percentage of defects in a recent manufacturing batch, a quality-control manager selects every twentieth widget that comes off the assembly line, starting with the tenth, until he obtains a sample of sixty widgets.
What type of sampling method is used?
Answer by Theo(13342) (Show Source):
You can put this solution on YOUR website!
looks like:

Systematic random sampling. With systematic random sampling, we create a list of every member of the population. From the list, we randomly select the first sample element from the first k elements on the population list. Thereafter, we select every kth element on the list.

this was obtained from the following link.

http://stattrek.com/survey-research/sampling-methods.aspx

here's another reference that might help.

http://ccnmtl.columbia.edu/projects/qmss/samples_and_sampling/types_of_sampling.html

lots more on the web.
just do a search for "sempling techniques".