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[主观题]
从某汽车零件制造厂生产的气缸螺栓中,抽取100个进行螺栓口径检查,测量数据列入下表.在显著性水平α=0.05下,
试检验假设:螺栓口径服从正态分布.
组区间 | 频数fi | 组区间 | 频数fi |
(-∞,10.95] (10.95,10.97] (10.97,10.99] (10.99 ,11.01] | 5 8 20 34 | (11.01,11.03] (11.03 ,11.05] (11.05 ,11.07] (11.07,+∞) | 17 6 6 4 |
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