Q: In statistics, what term is applied to techniques for modeling and analysing several variables to understand how the typical value of the dependent variable changes when one of the independent variables is varied, and the other variables are fixed?
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A: regression analysis

Q: Which gas is produced by the action of water on Calcium Carbide?
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A: acetylene

Q: Who created the character 'Rip Van Winkle'?
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A:
washington irving