题目内容

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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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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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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如要确诊大肠杆菌，常采用

A. 病毒分离鉴定
B. 细菌分离鉴定
C. 血液学检查
D. 免疫学检测
E. 病理剖检

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败血型禽大肠杆菌病在剖解上的特征是

A. 纤维素性心包炎、肝周炎
B. 肠粘膜出血
C. 脾脏肿大
D. 肺出血
E. 盲肠栓子

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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

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

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

如要确诊大肠杆菌，常采用

败血型禽大肠杆菌病在剖解上的特征是

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