What Does a Data Scientist Actually Do?
Skills:
Data Literacy70%
Key Takeaways
Introduction to a data scientist's role and responsibilities using data science and machine learning concepts
Original Description
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Many videos provide tips on becoming a data scientist—learning the necessary skills and the expected salaries in the field. But there isn’t nearly as much content that describes what data scientists do on the job. Today, we’ll address this topic.
Contrary to what many business stakeholders believe, a data scientist isn’t a magician who can use AI to fix any problem.
A data scientist’s primary purpose isn’t to pull data from the database either .
A company that thrives—thanks to its data scientists—can educate those within the organization that a data scientist’s primary goal is to create business value by using data . A data scientist’s role encompasses different activities, many of which we will describe in this video. Still, the first and most crucial point we need to remember is that the end goal of each task of a data scientist is to create business value.
Therefore—besides solid statistics knowledge and an ability to use such coding languages as Python, R, and SQL—data scientists need business and communication skills to be successful in their work .
00:00-00:36 Intro to the story
00:36-00:51 Talking to stakeholders
00:51-01:15 Reformulating the problem
01:15-01:41 Simpler solution
01:41-02:58 Formulating a hypothesis and A/B testing
02:58-03:46 Exploratory data analysis (EDA)
03:46-04:24 Second A/B test
04:24-04:50 ML Brainstorming
04:50-05:16 Machine learning mechanics
05:16-05:41 ML Fine-tuning
05:41-05:58 ML Engineering
05:58-06:05 ML A/B test
06:05-06:39 Conclusion
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Population vs Sample
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Statistics Tutorials: Mean, median and mode
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Skewness
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The Normal Distribution
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Central limit theorem
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Student's T Distribution
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Type I error vs Type II error
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Hypothesis testing. Null vs alternative
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The linear regression model
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Simple linear regression model. Geometrical representation
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INDIRECT Excel Function: How it works and when to use it [Advanced Excel]
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The ELIF keyword [Python Fundamentals]
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Relational Database Essentials
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Conditional Statements and Loops
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Backpropagation – The Math Behind Optimization
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Monte Carlo: Forecasting Stock Prices Part I
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Monte Carlo: Forecasting Stock Prices Part II
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Monte Carlo: Forecasting Stock Prices Part III
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Data Science & Statistics: Slicing a matrix in R
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Data frames in R - Exporting data in R
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Data frames in R - Transforming data PART II
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Data Frames in R - Subsetting a data frame
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Data Science & Statistics: Matrix arithmetic in R
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Data Science & Statistics: Indexing an element from a matrix
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Data Frames in R - Extending a data frame
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Data Science & Statistics: Creating a matrix in R FASTER
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Data Science & Statistics: Creating a Matrix in R
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Data frames - Importing data in R
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Data frames in R - Getting a sense of your data
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Data frames in R - Transforming data PART I
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Data frames in R - Import a CSV in R
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Data Science & Statistics: Matrix operations in R
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Data Science & Statistics: Matrix recycling in R
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Tableau vs Excel: When to use Tableau and when to use Excel
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Connecting data sources: Useful tips when connecting data sources to Tableau
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The Tableau interface: See how to navigate through the Tableau interface
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Tableau data visualization: Create your first Tableau visualization!
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Duplicating sheets: This is how to duplicate a sheet in Tableau
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Build a table in Tableau: The steps needed to create a simple table in Tableau
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Custom fields in Tableau: Using Tableau operators to create custom fields
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Custom fields in Tableau: Add calculations to tables through custom fields
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Totals in Tableau: Learn how to display subtotals and totals in Tableau
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Gross Margin calculation in Tableau
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What is a filter in Tableau: Set up a filter in Tableau to specify the data you want to show
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Joins in Tableau: Inner, outer, left, or a right join in Tableau
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Building a Tableau dashboard: Three types of charts you want to have in a Tableau dashboard
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Creating great looking charts in Tableau: Real life Exercise on charts in Tableau
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Joins in Tableau: Choose the correct join type
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How to make a data check in Tableau: A quick data check is better than no data check
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