回归方程中,如果对于x的给定值,求出y的一个预测值y,这就是()
A.区间估计
B.点估计
C.相关分析
D.回归分析
正确答案是B
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Complete each of the following sentences with a compound word derived from the one given in brackets.
All her friends were ( )of her good fortune. (envy)