Author Archives: Angelos88

Worked today with Dataquest and did the statistics courses to refresh my memory. So some observations are the following: Simple random sampling is not a reliable sampling method when the sample size is small. Because sample means vary a lot around the population mean, there’s a good chance we’ll get an unrepresentative sample. When weContinue reading “10-09-2020”

Today I discovered this page with various blogs about data science, statistics, machine learning etc. https://github.com/dataquestio/data-science-blogs which is a treasure. I checked some of the blogs and I realized that statistics is a major factor in Data science. There is also the technical part of programming (R, Python etc.) but the knowledge of statistics isContinue reading “09-09-2020”

It’s been a long time since I last wrote. During the summer I was studying mainly for the Musicology University and I have approximately 12 more lessons to finish. However, I managed to complete the Coursera Machine learning course , which was a bit difficult, but also very interesting. I try to decide if it’sContinue reading “31-08-2020”

I’m currently at the end of week 4 at Machine learning course , on Coursersa and I’ve also started the SQL course in DataQuest today. This is a link about SQL style guides https://www.sqlstyle.guide/ from this DataQuest course. I will try to work for approximately one hour on each course (Coursera and Dataquest), because IContinue reading “25-05-2020”

I’m making progress in Data Science , currently I’m at week 4 on Coursera Machine learning course and I also make progress in DataQuest. What I’ve found the last days is that I need to make time for projects every day and not focus only on the online courses. With projects I can build myContinue reading “12-05-2020”

I made progress today with the Coursera Machine learning course. I am at the end of week 2 and I plan to finish the course until the end of the month. Also I made progress in DataQuest, which helps me learn some concepts better , or to confirm I know the concepts well. I believeContinue reading “01-05-2020”

Made progress with DataQuest and finished the Python Introduction mission. These were mainly things I already knew but I understood them more in-depth, especially lists. I also finished 2 guided projects using Jupyter Notebook, and using Markdown for presenting them. I already have 25 hours of practice in DataQuest!  I also read an interesting articleContinue reading “30-04-2020”

Today I made progress in Dataquest and also started the machine learning course on Coursera! Also I’ve been accepted to Dataquest’s Covid-19 Financial Aid Scholarship. That means I’ll automatically receive free access to all of the courses and projects in the Data Analyst in Python and Data Analyst in R paths by Thursday, April 30.Continue reading “24-04-2020”

It’ s been a long time since I wrote in my blog. The coronavirus crisis forced us to stay inside our homes , so I found a chance studying data-science more. I spent many hours and I learned a lot , regarding plots in R, Markdown files and Github integration, spent some time on DataquestContinue reading “21-04-2020”

These days I’m watching the online Python course from Udemy https://www.udemy.com/course/python-for-data-science-and-machine-learning-bootcamp/ , which is really good! The exercises are really helpful for someone to apply the concepts learned throughout the course. Also this course is a good way to remember some concepts after my pause for about a month and hopefully understand them better.