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zli034
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say, E(1/x)=a and E(y)=b. a and b are constants and x and y are random variables.
Can I say E(y/x)=b/a? Thanks.
Can I say E(y/x)=b/a? Thanks.
The product of expectations is a statistical concept that refers to the expected value of the product of two random variables. It is calculated by multiplying the expected values of the two variables.
The product of expectations is often used to calculate the expected value of a function of two variables, which can then be used to make predictions or draw conclusions in research and data analysis.
The product of expectations is calculated by multiplying the expected values of two variables, while the sum of expectations is calculated by adding the expected values of two variables. This means that the product of expectations takes into account the interaction between the two variables, while the sum of expectations does not.
Yes, the product of expectations can be negative. This can occur when one variable has a positive expected value and the other has a negative expected value, or when both variables have negative expected values but their product is positive.
The product of expectations is related to other statistical measures, such as covariance and correlation, as it involves the interaction between two variables. It is also used in the calculation of the variance of a function of two variables.