You shouldn't calculate the mean of categorical variables, because the numeric values you attach to different categories are arbitrary (willekeurig) and the mean of those numeric values will depend on how many members each category has.

I'm going to encourage you a little, to help you get started. :)

I am going to encourage you a little, to help you get started :)
Since you looked us up and read the site enthousiastically, I would like to offer you a big discount.