What do you need to be a Data Science or Machine Learning Sp

What do you need to be a Data Science or Machine Learning Specialist?
* Medium blog posts
	* https://medium.freecodecamp.org/i-ranked-all-the-best-data-science-intro-courses-based-on-thousands-of-data-points-db5dc7e3eb8e
	* https://medium.freecodecamp.org/the-best-data-science-courses-on-the-internet-ranked-by-your-reviews-6dc5b910ea40
	* https://medium.com/@davidventuri/i-dropped-out-of-school-to-create-my-own-data-science-master-s-here-s-my-curriculum-1b400dcee412
* Other resources
	* http://www.johnwittenauer.net/machine-learning-exercises-in-python-part-1/
	* https://elitedatascience.com/learn-math-for-data-science
	* https://www.kdnuggets.com/2015/09/15-math-mooc-data-science.html
	* https://www.quora.com/What-are-the-mathematics-skills-a-data-scientist-needs
	* https://www.quora.com/What-are-good-ways-to-get-started-with-data-science-for-a-complete-novice
	* https://www.analyticsvidhya.com/blog/2017/04/comparison-between-deep-learning-machine-learning/
	* https://cdn-images-1.medium.com/max/1600/0*C2eUsvALEoqx20re.png
	* https://chadwgardner.com/resources/
	* http://datasciencemasters.org/


Working with data
* https://en.wikipedia.org/wiki/Oversampling_and_undersampling_in_data_analysis
* https://en.wikipedia.org/wiki/Skewness
* https://en.wikipedia.org/wiki/Dummy_variable_(statistics)
* https://www.quora.com/When-should-you-perform-feature-scaling-and-mean-normalization-on-the-given-data-What-are-the-advantages-of-these-techniques
* https://towardsdatascience.com/train-test-split-and-cross-validation-in-python-80b61beca4b6
* https://towardsdatascience.com/building-a-logistic-regression-in-python-step-by-step-becd4d56c9c8
* https://www.apsl.net/blog/2017/07/18/using-linear-discriminant-analysis-lda-data-explore-step-step/
* https://stats.stackexchange.com/questions/29385/collinear-variables-in-multiclass-lda-training
* https://stats.stackexchange.com/questions/69157/why-do-we-need-to-normalize-data-before-principal-component-analysis-pca
Other
* https://stackoverflow.com/questions/21151450/how-can-i-add-a-table-of-contents-to-an-ipython-notebook