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The pooled variance, in this case n,=12, n =21, ands = 18 and s2 = 23 اختر احدى الدجابات 21.18 22.5 21.23 22.1
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The pooled variance, in this case n,=12, n =21, ands = 18 and s2 = 23 اختر احدى الدجابات 21.18 22.5 21.23 22.1
The pooled variance, in this case n,=12, n =21, ands = 18 and s2 = 23 اختر احدى الدجابات 21.18 22.5 21.23 22.1
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