Question

If time is used as an independent variable in a simple linear regression, which of the following assumption could be violated?
1There exists a linear relationship between independent and dependent variables
2Successive observations of the dependent variable are uncorrelated
3Residual variation is same for all fitted values of dependent variable
4Residuals are normally distributed

Answer 1

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Answer 2

If time is used as an independent variable in a simple linear regration then it is true that tjere exist a linear relationship between the independent variable and the indipendent variable again residual variaotion is same for all fitted value of the dependent variable and lastly residuals are normally distributed .

This leaves as with an answer in 2 above that successive observations of the dependent variables are uncorrelated