human factors psychologist studied three computer keyboard designs. Three samples of individuals were given material to type on a particular keyboard, and the number of errors committed by each participant was recorded. The data are as follows: Keyboard A: 0,4,0,1,0 Keyboard B: 6,8,5,4,2 Keyboard C: 6,5,9,4,6

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A: Solution To find the confidence interval we will use paired sample result .

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A: Answer : r = - 0.6592

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Q: independent varia

A: definition:

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