题目
A two-dimensional rectangular array would be most suitable for organizing a collection of raw:
选项
A.panel data.
B.time-series data.
C.cross-sectional data.
答案
A
解析
A is correct. Panel data consist of observations through time on one or more variables for multiple observational units. A two-dimensional rectangular array, or data table, would be suitable here as it is comprised of columns to hold the variable（ ） for the observational units and rows to hold the observations through time. B is incorrect because a one-dimensional (not a two-dimensional rectangular) array would be most suitable for organizing a collection of data of the same data type, such as the time-series data from a single variable. C is incorrect because a one-dimensional (not a two-dimensional rectangular) array would be most suitable for organizing a collection of data of the same data type, such as the same variable for multiple observational units at a given point in time (cross-sectional data). A是正确的。面板数据，指的是将时间序列数据（表中列数据）和横截面数据（表中行数据）混合后的数据形式。二维矩形阵列或数据表在这里是合适的，因为它由用于保存观测单位变量的列和用于保存随时间变化的观测值的行组成。 B和C是不正确的，因为一维（不是二维）数组最适合组织相同数据类型的数据集合，例如来自单个变量的时间序列数据。