分组频数百分比600≤x<80025%800≤x<1000615%1000≤x<1200___45%1200≤x<1400922.5%1400≤x<1600______1600≤x<180025%合计40100%
分组频数百分比600≤x<80025%800≤x<1000615%1000≤x<1200___45%1200≤x<1400922.5%1400≤x<1600______1600≤x<180025%合计40100%
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