甲、乙两个生产车间加工相同的零件,甲车间工人日加工零件的均值为 150 件,标准差为 13.2 件,乙车间工人日加工零件的分布如下;
计算乙车间日加工零件的均值及标准差,并比较甲、乙两个车间日加工零件的离散程度。
(写出公式、计算过程、结果保留2为小数)
所以,乙车间日常零件数离散程度小于甲车间。
Goods are carried by several of transport--on road or rail, by sea or air.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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