Infinite error and T value of 0 for binary regression in R

Question

If factory is a binary variable i.e. can be 1 or 2 and toyota_average is a mean of all the toyotas produced in factory 1 and 2, why does running this result in a standard error infinite and t value of zero?

reg1<-lm_robust(toyota_average ~ factory, data_table_toyota, se_type="classical")
summary(reg1)

question from:https://stackoverflow.com/questions/65941247/infinite-error-and-t-value-of-0-for-binary-regression-in-r

Answer 1

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