In a field experiment on the effects of perceived control, residents on one floor of a nursing home were given opportunities for increased control in their lives (for example, arrange their own furniture, decide how to spend free time, choose and take care of a plant), whereas the residents on another floor were treated as usual. That is, the staff took care of these details. The feelings of well-being (on a 21-point scale) follow for the conditions of increased and no increased control. Using these data, test the null hypothesis that this minimal manipulation of perception of control had no effect on the residents€™ feelings of well-being.

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No Increased ncreased Control Control 8 15 17 14 9 12 14 13