An esports research team wants to investigate whether visual tracking speed in a dynamic target-acquisition task is affected by the monitor's refresh rate (low refresh rate vs. high refresh rate).
The research team requires a stratified sample of 40 participants. They obtained this sample from a large gaming organisation employing 75 professional esports players and 125 quality assurance (QA) testers.
Participants completed a standardised 5-minute spatial tracking simulation on a computer. Individual performance was measured by tracking the average response latency (in milliseconds) to peripheral stimuli.
There were two experimental conditions in the study:
Explain how the research team would have obtained the professional esports players for their stratified sample. Show your calculations.
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