Exercise

Find the error

We went ahead and included some code on the right, but there's still an error. Can you trace it and fix it?

In times of despair, help with functions such as sum() and rev() are a single command away; simply use ?sum and ?rev in the console.

Instructions

100 XP

Fix the error by including code on the last line. Remember: you want to call mean() only once!

Take Hint (-30 XP)