Math Problem Statement
回归方程是 Y = 30 − X中,Y的误差的方差的估计值为9,当 X = 1 时,Y的95%的近似预测区间是 A. (23,35) B. (24,36) C. (20,38) D. (21,39)
Solution
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Math Problem Analysis
Mathematical Concepts
Regression Analysis
Confidence Intervals
Normal Distribution
Formulas
Regression equation Y = 30 - X
Standard deviation calculation
Confidence interval formula
Theorems
Central Limit Theorem
Suitable Grade Level
Advanced High School
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