设连续型随机变量[img=93x25]18038f9080d782d.png[/img]，则[img=116x25]18038f908987b85.png[/img]_______________。其中[img=100x25]18038f9091f9377.png[/img] A: 0.6826 B: 0.6352 C: 0.5123 D: 0.5214
设连续型随机变量[img=93x25]18038f9080d782d.png[/img]，则[img=116x25]18038f908987b85.png[/img]_______________。其中[img=100x25]18038f9091f9377.png[/img] A: 0.6826 B: 0.6352 C: 0.5123 D: 0.5214
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