Mathematics, 18.05.2021 05:30 kaylaciamp65

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? A) cluster sampling
B) simple random sampling
C) stratified random sampling
D) systematic random sampling

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To survey clients at a massage-therapy spa, a researcher alphabetically lists all of the customers t...