求翻译：实验组平均采血量l比初学组明显增多，实验组穿刺次数比初学组明显减少，均有统计学差异（P是什么意思？

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Experiment Group Average blood volume than L Beginner Group increased significantly, lab group number needle than Beginner Group significantly reduced, there is statistical difference (P < 0.05).

The experimental group picks the blood to measure l equally compared to begin studies the group to increase obviously, the experimental group puncture number of times compared to begins studies the group to reduce obviously, has statistics difference (P<0.05).

Experimental l average blood than beginner groups increased significantly, experimental puncture than beginner groups decreased, there were statistical differences (P<0.05).

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