Trying the project A/B Testing for ShoeFly.com from Learn R.
Can’t get part 10 & 11 to work.
Have tried it myself and even copied and pasted from the hint tab. Still have the same error each time.
# define b_percentage_by_day here: b_percentage_by_day <- b_clicks_by_day %>% group_by(day) %>% mutate(percentage = count/sum(count))
Error: Problem with `mutate()` column `percentage`. ℹ `percentage = count/sum(count)`. ✖ invalid 'type' (closure) of argument ℹ The error occurred in group 1: day = "1 - Monday".