# Blog

## What is overfitting vs Underfitting?

Overfitting: Good performance on the training data, poor generliazation to other data. Underfitting: Poor performance on the training data and poor generalization to other data.Mar 21, 2016

## Is Overfit a word?

Definition of overfit in the English dictionary

The definition of overfit in the dictionary is too fit.

## What is bias vs variance?

Bias is the simplifying assumptions made by the model to make the target function easier to approximate. Variance is the amount that the estimate of the target function will change given different training data.Mar 18, 2016

## How do you determine over fitting?

Overfitting is easy to diagnose with the accuracy visualizations you have available. If "Accuracy" (measured against the training set) is very good and "Validation Accuracy" (measured against a validation set) is not as good, then your model is overfitting.Jun 5, 2019

## What is bias in ML?

The bias is known as the difference between the prediction of the values by the ML model and the correct value. Being high in biasing gives a large error in training as well as testing data. Its recommended that an algorithm should always be low biased to avoid the problem of underfitting.Jun 3, 2020

## What is ML fitting?

Fitting is an automatic process that makes sure your machine learning models have the individual parameters best suited to solve your specific real-world business problem with a high level of accuracy.

## Why is overfitting called high variance?

Models with low bias (which can learn from the training data well) often have high variance (and therefore an inability to generalize to new data), and this phenomenon is referred to as “overfitting”. By definition, therefore, high model variance despite low model bias is referred to as overfitting.

## Why one should avoid overfitting?

The main challenge with overfitting is to estimate the accuracy of the performance of our model with new data. We would not be able to estimate the accuracy until we actually test it. To address this problem, we can split the initial data set into separate training and test data sets.Jul 15, 2021