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[单选题]
专家小组法进行预测的时间比较短，因而适用于( )
A
长期或中期预测
B
中期或短期预测
C
短期预测
D
中期预测
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参考答案
试题答案：
C
答案解释：
特尔斐法适合中期或长期，专家小组法适合短期。
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为了对商品的价格作出较正确的预测，为什么必须做到定量与定性预测的结合?即使在定量预测法诸如加权移动平均数法、指数平滑预测法中，关于权数以及平滑系数的确定，是否也带有定性的成分?
区别决策中的定性分析和定量分析，试举例。
当据以计算回归方程式y=a+bx的一组实际数据点大致在回归直线上下接近于正态分布时，实际值落入预测值t+1上下区间内的概率达到95％的置信区间是( )
某地区积累了5 个年度的大米销售量的实际值(见下表)，试用指数平滑法，取平滑系数α= 0.9，预测第6年度的大米销售量(第一个年度的预测值，根据专家估计为4181.9千公斤)
已知上周期实际值xt=30，用指数平滑法预测出上周期预测值Ft=29，本期预测值Ft+1=29.7，则平滑系数α选取的值是( )
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