A psychologist studying the human factors of computer keyboards sets up an experiment to compare two different keyboard designs. He measures the number of words per minute typed by one group on Keyboard A and then he measures the number of words typed per minute by another group of people on Keyboard B. Use the data below to determine if the typing speeds on the two different keyboards are significantly different. Keyboard A (words per minute) 54, 62, 75, 59, 78, 64, 69, 72, 50, 73 Keyboard B (words per minute) 47, 51, 54, 62, 44, 51, 48, 65, 42, 44, 71, 68   Evaluate on a TI 83 calculator

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