Cheng Zheng

About

The most important takeaway from this course is understanding the importance of data, and data is everywhere in people’s’ daily life. By analysing data, people can get a lot of informations from it. For example, the way that insurance companies use to adjust customers’ premiums. If I had to explain to a future MIS0855 scholar what this course was…[Read more]

A data-driven service that I use regularly is BlackBoard. The row would be the courses that I am talking. The columns would be the due date, grades, new announcements, instructors, and the year of the class.

http://fivethirtyeight.com/features/significant-digits-for-wednesday-march-23-2016/
This article is interesting because it gives you groups of significant digits that have their meaning on a particular day. The numbers they give represent the most latest and interesting data around you. For example, 50 trillion means “Scientists were able to…[Read more]

One example of KPI that I use everyday is a step counter app on a phone. It is specific and measurable because it tells me how many steps I had each day. It is achievable because I can know how many steps i have to keep healthy. It is relevant because keeping steps on average is good for my health. It is time-variant because It tells me how many…[Read more]

I have never made one of these mistakes. However, I think the most common mistake is forget to full backup first before starting working on the database(Number 3). It is the most important to avoid because if you made some changes on the original data, and later, you want to compare it with the original one, you may lose it or you have to do the…[Read more]

http://fivethirtyeight.com/features/republican-leaning-cities-are-at-greater-risk-of-job-automation/
This article interest me because it talks about how technology affects people’ jobs that computers and robots replace people’ works. Because of automation, “routine” and “non-routine” jobs are most at risk, the employment rate and wage are bot…[Read more]

Personally, I believe the “simplify” is the most important one. The reason why we want data visualization is because we want it simple and easy to be understand. Imaging there have a massive number that you want to utilize, and it is hard to find something valuable by just looking at those numbers. However, when you simplify them with the help of…[Read more]

The biggest takeaway from Maurice Whetstone’s presentation was that the importance of data. Because of the importance, the way they collected data was different from most other companies, for examples, Macy’s collected its data every day, however, QVC collected its data every minute. He also told us that how interesting and useful he found the d…[Read more]

http://fivethirtyeight.com/features/are-we-headed-for-another-recession/
This article is interesting to me because I have another class discussed about the recession recently. It’s interesting that the business cycle is normally about 5 years, but now the economy has expansion for 7 years and we do not know when will the next recession comes or…[Read more]

An example of conventional wisdom that I have heard is that medicine has the same effect on men and women. However, it’s not true. For examples, aspirin can help men to prevent myocardial infarction, but it won’t work on women. To prove it, you can gather the information from the department which tests drugs effect on people, compare the…[Read more]