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1. A region conducted statistics and surveys on occupational diseases among workers, collecting a large amount of data. When conducting statistical analysis on these data, two items should be included: ( ). A. Statistical description and statistical inference B. Statistical sampling and statistical analysis C. Statistical sampling and statistical inference D. Statistical sampling and parameter estimation 2. The assessment of the hazards associated with production operations takes into account the likelihood of accidents occurring, the extent to which workers are exposed to hazardous conditions, and the severity of the consequences of those accidents ( ). A. Sum B. Sum of fractions C. Sum of absolute values D. Product Reference**: A D
A certain region conducted statistics and surveys on occupational diseases among workers, collecting a large amount of data. When conducting statistical analysis on these data, two items should be included: ( A ). A. Statistical description and statistical inference B. Statistical sampling and statistical analysis C. Statistical sampling and statistical inference D. Statistical sampling and parameter estimation 2. The assessment of the hazards associated with production conditions focuses on the likelihood of accidents occurring, the extent to which personnel are exposed to hazardous environments, and the severity of the consequences of those accidents (D). A. Sum B. Sum of fractions C. Sum of absolute values D. Product