We are ( ) Bachelor's degree.
A. pursue
B. pursuit
C. pursued
D. in the pursuit of
When he was young, Sam Walton inherited what gifts from his father？
A. being a good salesman
B. motivating people around him
C. running his finances
D. bargaining
The invention of the electric light bulb ______ ______ to Edison. (accredit)
对岭估计和主成分估计陈述正确的有
A. 二者都是无偏估计。
B. 二者可以在参数的局部范围内改进其最小二乘估计。
C. 岭估计是最小二乘估计向原点压缩后得到的一种估计，主成分也是一种压缩型有偏估计。
D. 主成分估计的主成分是一种人造变量。
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