NO.PZ202106160300004201
问题如下:
Which of the following best describes Batten's regression?
选项:
A. Time-series regression
B. Cross-sectional regression
C. Time-series and cross-sectional regression
解释:
A is correct. The data are observations over time.
Time series 没问题, 但stellar 和cpieng 放一起比较为什么不可以算是cross sectional呢?