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题目
COMM_V 190 101-104 2025W1 Final Exam - Practice Questions - Second Half
数值题
For some value of q, the expected value of X is 2.09, and the expected value of X^2 is 5.67 What is the variance of X?
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标准答案
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思路分析
Consider the relationship between expected values and variance: Var(X) = E[X^2] - (E[X])^2.
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