3_c

# you might use stat_summary(), which summarises the y values for each unique x
# value, to draw attention to the summary that you’re computing:

ggplot(data = diamonds) + 
  stat_summary(
    mapping = aes(x = cut, y = depth)
  )
  
ggplot(data = diamonds) + 
  stat_summary(
    mapping = aes(x = cut, y = depth),
    fun.ymin = min,
    fun.ymax = max,
    fun.y = median
  )