Coffee stations in offices often just ask users to leave money in a tray to pay for

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Coffee stations in offices often just ask users to leave money in a tray to pay for their coffee, but many people cheat. Researchers at Newcastle University replaced the picture of flowers on the wall behind the coffee station with a picture of staring eyes. They found that the average contribution increased significantly above the well-established standard when people felt they were being watched, even though the eyes were patently not real.
a) Was this a survey, an observational study, or an experiment? How can we tell?
b) Identify the variables.
c) What does "increased significantly" mean in a statistical sense?
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Related Book For  book-img-for-question

Stats Data And Models

ISBN: 662

4th Edition

Authors: Richard D. De Veaux, Paul D. Velleman, David E. Bock

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