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Making Work Better


The offices of a large corporation occupy all floors of a 10-story building. The corporation is planning to renovate the building and would like to incorporate features that will boost the morale of its employees. They will survey a group of 40 employees to help them decide which features to include.

Their study will not be well-designed if it involves


Random selection of the 40 participants from a list of everyone who works in the building.


Sorting all of the employees into three groups (upper management, middle management and office worker) and randomly choosing one of those groups. All of the people in that group will be surveyed.


Random selection of 4 floors in the building followed by random selection of 10 employees from each of those floors.


Employees answering an anonymous written survey.


Following up with employees who were randomly chosen to participate, but who were absent on the day of the survey.