The creative thinking scale was applied to the students of two groups, one of them is experimental, its members are 145 students and the other is a control group, and the number of its members is 138 students the arithmetic mean of the signs of the experimental group students 72, with a standard deviation 12 and the arithmetic mean of the signs of the control group 64 and a standard deviation 9. please test the significance of the difference between the average signs of (students of the experimental and control groups) at the level of significance 0.05

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