to survey clients at a massage - therapy spa,...
to survey clients at a massage - therapy spa, a researcher alphabetically lists all of the customers the spa had last month. the researcher sends a survey to the 13th person on the list (with the number 13 being randomly chosen), then surveys every 20th customer after that. which sampling method was used?\ncluster sampling\nsimple random sampling\nstratified random sampling\nsystematic random sampling
Answer
# Answer:
D. systematic random sampling
# Brief Explanations:
Systematic random sampling involves selecting every \(k\) - th element from an ordered population after a random start. Here, the researcher randomly chose the 13th person as a start and then surveyed every 20th customer, which fits this sampling method.