365 Data Science Q&A Hub

Receive support from your instructors, build positive interactions with fellow data science students, and have fun while advancing in data science. Please be respectful and patient while interacting with others in the 365 Data Science Q&A hub. For more details on the code of etiquette, you should abide by, read our Community Guidelines.

Ask a question
By course
  • Introduction to Tableau
  • The Complete Data Visualization Course with Python, R, Tableau, and Excel
  • Introduction to R Programming
  • Data Preprocessing with NumPy
  • Introduction to Data and Data Science
  • Data Cleaning and Preprocessing with pandas
  • Introduction to Business Analytics
  • Data Analysis with Excel Pivot Tables
  • SQL
  • Credit Risk Modeling in Python
  • Python Programmer Bootcamp
  • SQL + Tableau + Python
  • Introduction to Jupyter
  • Statistics
  • Mathematics
  • Introduction to Excel
  • Probability
  • Starting a Career in Data Science: Project Portfolio, Resume, and Interview Process
  • SQL + Tableau
  • Time Series Analysis with Python
  • Power BI
  • Product Management for AI & Data Science
  • Git and GitHub
  • Deep Learning with TensorFlow 2
  • Customer Analytics in Python
  • Web Scraping and API Fundamentals in Python
  • Introduction to Python
  • Python for Finance
  • Machine Learning in Python
  • Advanced Microsoft Excel
  • Convolutional Neural Networks with TensorFlow in Python
  • Data Strategy
  • Fashion Analytics with Tableau
  • Dates and Times in Python
  • SQL for Data Science Interviews
  • Data Literacy
  • AI Applications for Business Success
  • Linear Algebra and Feature Selection
  • Machine Learning with Naïve Bayes
  • Machine Learning in Excel
  • Machine Learning with Support Vector Machines
  • A/B Testing in Python
  • Machine Learning with Decision Trees and Random Forests
  • Machine Learning with K-Nearest Neighbors
  • Machine Learning with Ridge and Lasso Regression
  • Data-Driven Business Growth
  • Corporate Strategy
  • Marketing Strategy
  • Negotiation
  • Management
  • Persuasion and Influence
  • Excel for Project Management
  • Agile and Scrum Project Management
  • Project Management
  • Blockchain for Business
  • How to Think Like a Data Scientist to Become One
  • Power Query and Data Modeling
  • Introduction to DAX
  • Building Business Reports Using Power BI
  • The Machine Learning Process A-Z
  • Working with Text Files in Python
  • Intermediate Python Programming
  • Advanced SQL
  • The Machine Learning Algorithms A-Z
  • Customer Churn Analysis with SQL and Tableau
  • Machine Learning Deep Dive: Business Applications and Coding Walkthroughs
  • Customer Engagement Analysis with SQL and Tableau
  • Advanced SQL for Data Engineering
  • Communication and Presentation Skills for Analysts and Managers
  • Intro to ChatGPT and Generative AI
  • Data Analysis in PowerBI with ChatGPT
  • Mastering Key Performance Indicators (KPIs)
  • Sign-Up Flow Optimization Analysis with SQL and Tableau
  • Python for Social Media Analytics
  • Intro to NLP for AI
  • Data Analysis with ChatGPT
  • ChatGPT for Data Science
  • Intro to LLMs
  • Growth Analysis with SQL, Python, and Tableau
  • Intro to Data Engineering
  • Statistical Tests in Sales and Marketing
  • Build Chat Applications with OpenAI and LangChain
  • Introduction to Vector Databases with Pinecone
  • Intro to Revenue Analytics
  • Intro to AI
  • Speech Recognition with Python
  • LLM Engineering in Practice with Streamlit and OpenAI
  • Building Data Pipelines with Apache Airflow
By status
  • Answered
  • Resolved
Clear all
Order by
  • Date posted
  • Date last answered
  • Number of answers
  • Number of votes
By course
  • Introduction to Tableau
  • The Complete Data Visualization Course with Python, R, Tableau, and Excel
  • Introduction to R Programming
  • Data Preprocessing with NumPy
  • Introduction to Data and Data Science
  • Data Cleaning and Preprocessing with pandas
  • Introduction to Business Analytics
  • Data Analysis with Excel Pivot Tables
  • SQL
  • Credit Risk Modeling in Python
  • Python Programmer Bootcamp
  • SQL + Tableau + Python
  • Introduction to Jupyter
  • Statistics
  • Mathematics
  • Introduction to Excel
  • Probability
  • Starting a Career in Data Science: Project Portfolio, Resume, and Interview Process
  • SQL + Tableau
  • Time Series Analysis with Python
  • Power BI
  • Product Management for AI & Data Science
  • Git and GitHub
  • Deep Learning with TensorFlow 2
  • Customer Analytics in Python
  • Web Scraping and API Fundamentals in Python
  • Introduction to Python
  • Python for Finance
  • Machine Learning in Python
  • Advanced Microsoft Excel
  • Convolutional Neural Networks with TensorFlow in Python
  • Data Strategy
  • Fashion Analytics with Tableau
  • Dates and Times in Python
  • SQL for Data Science Interviews
  • Data Literacy
  • AI Applications for Business Success
  • Linear Algebra and Feature Selection
  • Machine Learning with Naïve Bayes
  • Machine Learning in Excel
  • Machine Learning with Support Vector Machines
  • A/B Testing in Python
  • Machine Learning with Decision Trees and Random Forests
  • Machine Learning with K-Nearest Neighbors
  • Machine Learning with Ridge and Lasso Regression
  • Data-Driven Business Growth
  • Corporate Strategy
  • Marketing Strategy
  • Negotiation
  • Management
  • Persuasion and Influence
  • Excel for Project Management
  • Agile and Scrum Project Management
  • Project Management
  • Blockchain for Business
  • How to Think Like a Data Scientist to Become One
  • Power Query and Data Modeling
  • Introduction to DAX
  • Building Business Reports Using Power BI
  • The Machine Learning Process A-Z
  • Working with Text Files in Python
  • Intermediate Python Programming
  • Advanced SQL
  • The Machine Learning Algorithms A-Z
  • Customer Churn Analysis with SQL and Tableau
  • Machine Learning Deep Dive: Business Applications and Coding Walkthroughs
  • Customer Engagement Analysis with SQL and Tableau
  • Advanced SQL for Data Engineering
  • Communication and Presentation Skills for Analysts and Managers
  • Intro to ChatGPT and Generative AI
  • Data Analysis in PowerBI with ChatGPT
  • Mastering Key Performance Indicators (KPIs)
  • Sign-Up Flow Optimization Analysis with SQL and Tableau
  • Python for Social Media Analytics
  • Intro to NLP for AI
  • Data Analysis with ChatGPT
  • ChatGPT for Data Science
  • Intro to LLMs
  • Growth Analysis with SQL, Python, and Tableau
  • Intro to Data Engineering
  • Statistical Tests in Sales and Marketing
  • Build Chat Applications with OpenAI and LangChain
  • Introduction to Vector Databases with Pinecone
  • Intro to Revenue Analytics
  • Intro to AI
  • Speech Recognition with Python
  • LLM Engineering in Practice with Streamlit and OpenAI
  • Building Data Pipelines with Apache Airflow
By status
  • Answered
  • Resolved
Clear all
8441 results
Michiel
1
1
Coding Portion for feature engineering of continuous variables kind of missing
At the end of section 7, there is a coding portion that is related to encoding, and not transformation, scaling or...
The Machine Learning Process A-Z
Last answered: Apr 16th 2023
755 views
Eslam Mohamed Helmi
1
2
Resolved: Another Prospective for the Solution
I am quite confused regarding the solution as the given solution is just checking the year when an employee starteed...
SQL + Tableau
Last answered: May 22nd 2024
719 views
Dylan Ritter
Super learner
This user is a Super Learner. To become a Super Learner, you need to reach Level 8.
0
7
Standard deviation compared to Variance
If I understand, the standard deviation shows how close the data are to the mean and variance only helps with finding...
Statistics
Last answered: Nov 11th 2024
2640 views
PACKIARAJAN S
2
1
regarding Colors
Hi,  I am getting an eorror while plotting different colors...
The Complete Data Visualization Course with Python, R, Tableau, and Excel
Last answered: Feb 27th 2023
1216 views
Jaycus Goh
0
1
Database becomes empty every time connection restart
Hi, The employees database is working fine after I loaded it, but every time I restart my MYSQL, I tried to query...
SQL
Last answered: Mar 1st 2023
880 views
Setareh Alibakhshi
0
1
NLU on instagram
Hi, is there a course on how to apply NLU? and how to analyse instagram comments? 
Data Literacy
Last answered: Feb 25th 2023
649 views
Turki Bin Shaber
1
1
Question to instructor
how to calculate variance for female and male groups using the formula? The given formula in Excel homework does not...
Statistics
Last answered: Nov 21st 2023
1192 views
Eslam Mohamed Helmi
2
1
Resolved: Joining employees in the Outer Query
Why did we join employees table in the outer query?  Is it not enough just to join cte1 and cte2 like that with...
Advanced SQL
Last answered: Sep 20th 2023
769 views
Eslam Mohamed Helmi
4
1
Solution to Q#4
I am quite confused regarding question #4 and its solution  The question asks to obtain the result without using...
Advanced SQL
Last answered: May 22nd 2024
723 views
Guillem Roig
0
1
Resolved: Reformat doesn't work with INSERT INTO statement
Hi, is it normal that the function beautify/reformat doesn't when using INSERT INTO statement? It does work with SELECT.
SQL
Last answered: Feb 24th 2023
747 views
Mohamed Orabi
0
1
Certification fees
Is the certificate sharable for any CV and LinkedIn?  Is there any fees to have full track certificate and make...
Last answered: Feb 24th 2023
739 views
Andrei
0
1
Resolved: Rename a column
Hello, It is correct to change the name of a column with the CHANGE COLUMN? And also to change it to DEFAULT in the...
SQL
Last answered: Feb 24th 2023
1225 views
Donald Trenholm
0
3
Resolved: Cant find the link for the employee.sql database.
Feeling a little dumb that I can't find the link. I can get what looks like the employee code in MySQL but all the...
SQL
Last answered: Feb 25th 2023
1057 views
Ashraf Shagar
1
2
Resolved: Saving the figures using python
Hi, In python, I have checked the figures that i have created and found out that they do not have the graph that i...
The Complete Data Visualization Course with Python, R, Tableau, and Excel
Last answered: Feb 28th 2023
925 views
Ly Do
1
2
Certified courses i have taken in 2020 is not updated in my learning profile, please kind help to re
I have emails sen to me notifying about completing the certification but they are not showing in my current...
Mathematics
Last answered: Nov 9th 2023
789 views

popular questions

Omar R. Valencia García
28
4
The line reg.predict(1740) does not work anymore
Rafael Rodrigues de Siqueira
23
6
The ROLLBACK not working according to step-by-step class
E E
13
1
I didn't quite understand the nuance from 3:48 till the end
Toluwase Olukayode
12
4
not showing as completed even though I have complete the course. Please help me fix it
Gabriel de Jesus Patiño Pino
12
0
The answer to the third question is wrong (Practical exam 2: Discrete Distributions)
Davide Sanchioni
11
3
Sixth question of the practice exam
Christine Li
11
9
Resolved: My comments on this course
Adetunji Fasiku
11
1
The Second Question's Confusing Ability
Anower Hossain
10
1
course question
Ali Safaei
9
1
Using z statistics instead of t statistics
Mohamed Abdelazim Mohamed Elsrougy
9
2
Resolved: Downloading Video Materials
Abdulmalik Alkhamis
9
1
This is inconsistent with the quiz
Luiz
9
1
Suggestion: change the robot and arrows analogy
Abdelrahman El-kattan
8
5
the conclusion?
Zachary Roblyer
8
3
Resolved: Feedback for practice exam