问题
解答题
观察下面表格: (1)完成表中的频率分布表; (2)根据表格,画出频率分布直方图; (3)估计数据落在[10.95,11.35)范围内的概率约为多少?
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答案
(1)频率依次为:0.03,0.09,0.13,0.16,0.26,0.20,0.07,0.04,0.02,1.00.
(2)
(3)0.75
(1)频率依次为:0.03,0.09,0.13,0.16,0.26,0.20,0.07,0.04,0.02,1.00.
(2)频率分布直方图如图所示
(3)数据落在[10.95,11.35)范围的频率为
0.13+0.16+0.26+0.20=0.75.