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【单选题】
关于标准差,下面说法错误的是A.
标准差可综合反映各观察值的离散程度
B.
总体标准差用δ表示，样本标准差s表示
C.
标准差与原资料的单位相同
D.
两组资料的单位不同时，仍可以采用标准差来比较它们的离散程度
E.
标准差相等的两组资料仍不能判定其均数的大小关系
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举一反三
【单选题】Inform Shanghai coast radio station of the destination of the vessel survivors
A.
Shanghai coast radio station shall be informed of the name of the vessel with survivors
B.
Shanghai coast radio station shall be informed of the call sign of the vessel with survivors
C.
Shanghai coast radio station shall be informed of the destination of the vessel with survivors
D.
Shanghai coast radio station shall be informed of the number of survivors on the vessel
【单选题】Inform Shanghai coast radio station of the condition of the survivors
A.
Shanghai coast radio station shall be informed of the condition of survivors
B.
Shanghai coast radio station shall be informed of the condition of the vessel in distress
C.
Shanghai coast radio station shall be informed of the number of survivors on vessel
D.
Shanghai coast radio station shall be informed of the destination of the vessel with survivors
【单选题】Inform Shanghai coast radio station of the number of survivors on the vessel
A.
Shanghai coast radio station shall be informed of the name of the vessel with survivors
B.
Shanghai coast radio station shall be informed of the call sign of the vessel with survivors
C.
Shanghai coast radio station shall be informed of the destination of the vessel with survivors
D.
Shanghai coast radio station shall be informed of the number of survivors on the vessel
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