Question

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?

Explanation:

In systematic sampling, elements are selected at regular intervals from an ordered population. Here, every twentieth widget starting with the tenth is selected, which follows a fixed - interval pattern.

Answer:

Systematic sampling