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【多选题】
下述说法正确的有A.
总体参数落在统计值的区间范围越小，精确度越高。
B.
样本是随机的，统计值也是随机的。
C.
对企业员工的研究中，样本直接从员工名册中抽取，每名员工既是元素，又是抽样单位。
D.
置信度越高，需要的样本规模也越大。
E.
在样本规模一定时，置信度与精确度之间具有正向关系。
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皮皮学刷刷变学霸
举一反三
【单选题】Output supply is increasing in the interest rate because
A.
labor demand is increasing in the interest rate.
B.
labor demand is decreasing in the interest rate.
C.
labor supply is increasing in the interest rate.
D.
labor supply is decreasing in the interest rate.
【单选题】A supply curve slopes upward because
A.
as more is produced, total cost of production falls.
B.
an increase in input prices increases supply.
C.
the quantity supplied of most goods and services increases over time.
D.
an increase in price gives producers an incentive to supply a larger quantity.
【简答题】夹钳式手部通常采用( )、液动、( )和电磁来驱动手指的开合。
【单选题】A supply curve slopes upward because
A.
as more is produced, total cost of production falls.
B.
an increase in input prices increases supply.
C.
a decrease in input prices decreases supply.
D.
an increase in price gives producers incentive to supply a larger quantity.
【简答题】McDonald allowed Harrington to supply Pepperidge Farm because it could______.
【单选题】A supply curve slopes upward because
A.
a decrease in input prices decreases supply.
B.
an increase in input prices increases supply.
C.
as more is produced, per-unit costs of production fall.
D.
an increase in price gives producers incentive to supply a larger quantity.
【单选题】The money supply is vertical because
A.
prices are indeterminate.
B.
prices have no real impact.
C.
the money supply is set by policy.
D.
prices are counter-cyclical.
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