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Wonjun Choi commented on the post, Weekly Question #10: Complete by April 23, on the site 6 years, 6 months ago
The course evaluation for each classes can be a data-driven service. The columns should include course name, the professor, ratings, and students review. The row should include answers for each columns.
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Wonjun Choi commented on the post, Weekly Question #8: Complete by April 9 class start, on the site 6 years, 6 months ago
The article talks about the data breach of the nation’s 2nd biggest airline carrier, Delta. There was a cyber attack on a vendor that runs a chat function on the carrier’s website. This happened to the Sears as well. Delta responded that it would cover any unauthorized transactions resulting from the breach. It is highly possible that many…[Read more]
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Wonjun Choi commented on the post, Weekly Question #7: Complete by March 26, 2018, on the site 6 years, 6 months ago
One KPI that I try to use is the customer satisfaction score. When I work at a restaurant as a server, I try to keep up with how much the customers are satisfied with the restaurant’s experience. It is very relevant to what I do. The higher the satisfaction is, the happier I am and the more tips I earn.
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Wonjun Choi commented on the post, Weekly Question #6: Complete by March 19, on the site 6 years, 7 months ago
Even though I have very little experience with managing data or utilizing data, I have made this mistake over and over that is… start working on the database without doing a full backup first. I’m pretty sure that happened to so many people. And once they have incidents where the original data is damaged somehow, they can’t get the data back…[Read more]
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Wonjun Choi commented on the post, Weekly Question #5: Complete by March 12, 2018, on the site 6 years, 7 months ago
For this week, I found an article about the data breach. Many companies have failed to protect their data from hackers and paid a significant amount of ransoms. This time, it’s Uber. Uber was unable to defend the drivers’ information back in 2016 but stayed quiet. Pennsylvania sued Uber under data breach notification law that requires companies to…[Read more]
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Wonjun Choi commented on the post, Weekly Question #4: Complete by Feb 19, on the site 6 years, 8 months ago
I believe “ask why” is the most important principle of the data visualization. It’s easy to tell the users what’s the result. However, if a data visualization is failing to address what is the cause of the result or reason of the result, the data visualization is meaningless. By allowing the viewers to understand why such result was drawn, the…[Read more]
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Wonjun Choi commented on the post, Weekly Question #3: Complete by Feb. 12, on the site 6 years, 8 months ago
The industry that utilizes data science the most will be affected by data science. That’s a norm. In my opinion, investment industry is affected by data science the most. Sometimes investors are responsible to manage a huge fund that they are managing for someone else or some other company. I do not hear much of data science incorporated to…[Read more]