17 questions linked to/from Independent variable = Random variable?
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### Question regarding "independent variables" term in regression analysis definition [duplicate]

Definition: Regression analysis is used for explaining or modeling the relationship between a single variable Y, called the response, output or dependent variable, and one or more predictor, input, ...
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### What is meant by a "random variable"?

What do they mean when they say "random variable"?
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### What is the difference between variable and random variable?

I know that "variable" means "values which vary." In a simple linear regression model : $$Y=\beta_0+\beta_1X+\epsilon$$ $X$ is variable that is the values of $X$ vary. Why is $X$ not a random ...
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### Distribution of simple linear model

Question: Am I correct in assuming that the below statement only makes sense if we're conditioning on realised data? I'm finding it hard to understand the following statement; For a simple normal ...