{"response":"{\"What is Root Mean Squared Error (RMSE)?

Root Mean Squared Error (RMSE) is like how far off your guesses are when you’re trying to guess someone’s age.

Imagine you and your friend are playing a game where you try to guess how old the teacher is. You write down your guess, and later you find out the actual age. The difference between your guess and the real age is error.

Now, let's say you play this game with your whole class. Everyone guesses the teacher’s age, and each person has their own error, how wrong they were. To figure out how good the class was as a group, we can do something like this:

1. Take all those errors.
2. Square them (so bigger mistakes hurt more).
3. Find the average of these squared errors.
4. Then take the square root to get back to normal numbers.

That final number is your RMSE, it shows how far off, on average, everyone was in their guesses.

Think of it like measuring how much you're missing the bullseye when throwing darts. The more off you are, the bigger your RMSE!