A researcher designs an experiment in which a rat is attracted to the end of a ramp that divides, leading to doors of three different colors. The researcher sends the rat down the ramp n590 times and observes the choices listed in Table 14.1. Does the rat have (or acquire) a preference for one of the three doors?

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Table 14.1 Rat's Door Choices Door Green Red Blue Observed Count (O;) 20 39 31