超星 - chapter 10 自测题

单选题

Six years ago material M cost $10 per kg and the price index most appropriate to the cost of material M was 130. The same index show stands at 510.What is the best estimate of the current cost of material M per kg?

A. $2.55
B. $29.23
C. $39.23
D. $51.00

单选题

What is the purpose of seasonally adjusting the values in a time series?

A. To obtain an instant estimate of the degree of seasonal variatio
B. To obtain an instant estimate of the trend
C. To ensure that seasonal components total zero
D. To take the first step in a time series analysis of the data

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单选题

Which of the following are components of a time series analysis?i. Trendii. Seasonal variationiii. Cyclical variation

A. i and ii
B.i and iii
C. ii and iii
D.i, ii and iii

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单选题

Under which of the following circumstances would a multiplicative model be preferred to an additive model in time series analysis?

A. When accurate forecasts are required
B. When the trend is steady
C. When a model easily understood by non-accountants is required
D. When the trend is increasing or decreasing

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