
This course includes our updated coding exercises so you can practice your skills as you learn.
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Variables are essentially labeled containers used to store data values. Instead of remembering a specific number or string, you give it a name like user_age = 25.
These are the symbols that perform actions on variables and values.
Arithmetic: +, -, *, /.
Comparison: == (equal to), != (not equal), > (greater than).
Lists are ordered collections of items stored in a single variable, defined by square brackets [].
Accessing Elements in a List
Modifying Elements in a List
Adding Elements to a List
Removing Elements from a List
Removing an Item by Value
This is how your code makes decisions. It checks if a condition is True or False. If it’s true, the code inside runs; if not, it skips it (or goes to an else).
You will need these datasets for the next exercises
Introduction to Pandas library in Python using Google Colab
- Import pandas as pd
- Upload datasets
- Explore datasets
You are going to learn how to select specific columns in dataframe
- Here you are going to use isnull() and sum() functions to detect missing value in dataset
- Treating missing values with dropna() etc.
Sometimes your dataset has a seperator which is not comma (,) in this case your read_csv() will have problems to read it. You need to specify it
We are unifying Employees lists together
setting up colab environment
In this section you will see how to assess the goodness of your prediction by calculating the error between actual Y values and predicted Y. The smaller it is the better results you get.
In this course, we aim to provide you with a focused and efficient approach to preparing for data science tasks through practical questions. I understand that your time is valuable, so I have carefully curated the content to cut out any unnecessary noise and provide you with the most relevant materials.
First section of the course will prepare you for fundamentals of Python.
Moving beyond theory, the course will dive into a wide range of practical data science questions. These questions have been carefully selected to represent the types of problems frequently encountered in real-world data science roles. By practicing these questions, you will develop the skills and intuition necessary to tackle similar problems during interviews.
Throughout the course, we have filtered out any extraneous materials and focused solely on the core topics and questions that are most likely to come up in data science interviews. This approach will save you time and allow you to focus your efforts on what truly matters.
Index:
Missing values and how to handle them? (Python)
What are categorical variables and how to include them into model (Python)
What is a Correlation Matrix's role? (Python)
How to check relationship between variables? (Python)
How to interpret the regression analysis? (Python)
How to improve the regression model results with logarithmic transformation? (Python)
How to use polynomial model? (Python)
What is an overfitting? How to prevent it? (Theory)
Supervised vs Unsupervised Learning (Theory)
Parametric and Non-parametric model (Theory)