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
Filter courses
  • 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
Filter questions by
  • Answered
  • Resolved
Clear all
Order by
  • Posted on
  • Last answered
  • Answers
  • Popularity
Filter courses
  • 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
Filter questions by
  • Answered
  • Resolved
Clear all
8328 results
Mayank Mittal
0
1
Facing some issues with tableau (multiple issues)
Hello Ned, I tried the same way as you did and almost got the same result too but some issues I faced which I can't...
Introduction to Tableau
Last answered: Jan 5th 2023
1334 views
Dinahar Margret Albert
0
2
Using RELATEDTABLE function to get the sum from fact table:
In the very same sample tables, is it possible to calculate the sum of total sales of each customer from fact table...
Power BI
Last answered: Jan 3rd 2023
1661 views
Vladyslav Potiatynok
Super learner
This user is a Super Learner. To become a Super Learner, you need to reach Level 8.
1
1
Purpose of adding columns
Hi, what does these lines of code do? I check the result before applying and after - no difference.
The Machine Learning Process A-Z
Last answered: Aug 16th 2024
892 views
Mohamed El Hamly
Super learner
This user is a Super Learner. To become a Super Learner, you need to reach Level 8.
1
1
T-statistic vs Z-statistic
A common rule of thumb is that for a sample containing more than 50 observations, we use the z-table instead of the...
Statistics
Last answered: Nov 9th 2023
1563 views
Helen Vela
0
8
Resolved: The last video is finished, but it won't go to the next one... also there is nothing showing after t
The last video is finished, but it won't go to the next one... also there is nothing showing after the "The Python...
Introduction to Python
Last answered: 12 days ago
1811 views
Osama Shahbaz
0
3
Differing Period format
Hi, when I connect the excel file to tableau, my period takes on the format of 201.601 as opposed to 2016.01. Would...
Introduction to Tableau
Last answered: Apr 10th 2023
1514 views
Muhittin Arslan
0
4
Resolved: Ken Jee - Jeff Li upcoming course
In the upcoming section of the website there was a course with Ken Jee - Jeff Li. Now that course is not shown...
Last answered: Apr 3rd 2023
856 views
Vladyslav Potiatynok
Super learner
This user is a Super Learner. To become a Super Learner, you need to reach Level 8.
1
2
Resolved: Missing requirements.txt file
Hi, Could you please add requirements.txt file inside main branch as it is missing?
The Machine Learning Process A-Z
Last answered: Jan 6th 2023
763 views
Helen Vela
0
1
I can't see the output
I can't see the output, pls see pics below Somehow, an asterisk appeared where a number used to appear, and shift...
Introduction to Python
Last answered: Jan 6th 2023
1344 views
abdelilah “Genrosious” skalli
1
1
Resolved: Do i always have to download the assignement for it to be checked as done ?
Do i always have to download the assignement for it to be checked as done ?
SQL
Last answered: Jan 2nd 2023
729 views
Muhammad Emmmad Siddiqui
0
1
Reverse engineering
I want to do reverse engineering in which I need to create a data set within the prescribed boundary through a P...
Statistics
Last answered: Jul 1st 2024
1276 views
Edward Osei
0
2
Returing a null output
My solution to the question is exactly what has been provided, but whenever I input the first and last name...
SQL
Last answered: Jan 6th 2023
935 views
Abayomi-Rufai Obarinde
Super learner
This user is a Super Learner. To become a Super Learner, you need to reach Level 8.
0
1
Resolved: Different between t-test and z-test
Why are we saying there is no variance when we are able to calculate the standard deviation
Statistics
Last answered: Jan 5th 2023
1442 views
Nunno Nugroho
1
0
How likely sample variance bigger or smaller than population variance?
In this lesson, we've been taught that sample variance is bigger than population variance, then this get me thinking...
Statistics
1691 views
Ankita Jain
0
1
Why have we taken beta1=0 as null hypothesis?
Hi , Could you please help me on what basis have we decided the null and alternative hypothesis
Machine Learning in Python
Last answered: Jun 15th 2023
928 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