A study testing the ettect of caffeine on mental performance invited 200 adult participants for an experiment. These 200 individuals were selected by taking random samples of 50 people from ecach of the following groups: 1) men who did not drink coffee. 2) women who did not drink coffee, 3) men who regularly drank coffee and 4) women who regularly drank coffee. What type of sampling method is this? Oa Simple random sampling. Ob. Stratified sampling Oc Voluntary sampling. Od. Convenience sampling. Oe. Multistage sampling.

A study testing the ettect of caffeine on mental performance invited 200 adult participants for an experiment. These 200 individuals were selected by taking random samples of 50 people from ecach of the following groups: 1) men who did not drink coffee. 2) women who did not drink coffee, 3) men who regularly drank coffee and 4) women who regularly drank coffee. What type of sampling method is this? Oa Simple random sampling. Ob. Stratified sampling Oc Voluntary sampling. Od. Convenience sampling. Oe. Multistage sampling.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section: Chapter Questions

Problem 13PT

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