Colour or text? In an experiment, 32 volunteer subjects are briefly shown seven cards, each displaying the name of a colour printed in a different
Colour or text? In an experiment, 32 volunteer subjects are briefly shown seven cards, each displaying the name of a colour printed in a different colour (example: "red" written in blue, "blue" written in red, and so on). The sub- ject is asked to perform one of two tasks: memorize the order of the words or memorize the order of the colours. Researchers record the number of cards remembered cor- rectly. Then, the cards are shuffled and the subject is asked to perform the other task. The tables display the results for each subject. Is there any evidence that either the colour or the written word dominates perception? a) What role does randomization play in this experiment? b) State appropriate hypotheses. c) Are the assumptions necessary for inference reason- able here? d) Perform the test. e) State your conclusion. Subject Colour Word Subject Colour Word 17 18 19 20 21 22 23 24 25 26 27 12 28 13 29 14 30 15 31 16 32
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