Sample size	Sample Heads	Confindence Interval	Half-width	Width
100	35	(0.257,0.443)	0.093	0.186
400	140	(0.303,0.397)	0.047	0.094
800	280	(0.317,0.383)	0.033	0.066
1600	560	(0.327,0.373)	0.023	0.046

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