What does it mean to manipulate a variable? b) What does it mean to control a variable? c) What is the diffe?

lol... is this ur psyche HW? to manipulate a variable is to change it to control a variable is to keep it constant a control group is your standard group. The controlled variable is the item or items you add to the control group to make it slightly different. lol.. next time do merara's HW on ur own :p

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