Best Free Resources (better than paid ones)
SQL:
Enroll for Hands on Free Course
Rather than only watching videos, Solve questions in the websites itself.
Statistics:
Build your probability and hypothesis testing intuition.
Khan Academy (Most Underrated resource)
Watch Videos and solve questions for understanding.
Alternative: If you are visual learner, but no hands practice included (must needed for deeper understanding). Watch this if not understood any topic.
StatQuest Youtube series
Mathematics:
Learn Linear Algebra and Calculus for intuition behind Machine Learning Algorithms
Machine Learning
Hands on Coding Practice Available here:
Use menu option for more Tracks on Top Left side of this Website.
Bias and Variance
Linear Regression
Logistic Regression
Naive Bayes
Gaussian Naive Bayes
K- Means
PCA
CART – Classification and Regression Trees
Random Forests
Support Vector Machines (SVM)
Gradient Boosting
AdaBoost
XGBoost