I am new to statistics and running a multi variate regression model in R to predict number of days. How do I check if my data is best fit for multi linear regression technique. Do I need to check the distribution of my response(y) variable or explanatory(x's) variables and see if they are normally distributed? If yes, then how would i do that in R? and if no, then what i need to see if the data is fit for the multi linear regression in R?
Many thanks in advance! P.K.