zihao95%

Is economics science? – An opinion piece

Economics has long been criticized for being pseudoscience – it uses carefully designed mathematical models, yet very often fails to predict the future trend; it claims to study human behavior in a scientific way, yet fails to understand the messy nature of human beings. In this blog, I will argue why economics is a type …

Continue reading “Is economics science? – An opinion piece”

How to get the result you want from a survey

Many people are not aware that the outcome very much depends on how you conduct the survey, and what questions you ask. I will talk about the effect of leading questions in this blog. Leading questions can be defined in several ways. A very simple definition is a question which you can only reply ‘yes/agree’ …

Continue reading “How to get the result you want from a survey”

Problem of false-positive in medical tests

Misinterpreting the outcome of a medical test can be problematic. Medical testing usually have the problem of false-positive, which describes the situation of wrongly indicate a medical condition is present when it is not (which involves some basic statistics). In a medical test for whether a person has a particular disease or not, the outcome …

Continue reading “Problem of false-positive in medical tests”