What is statistics 什么是统计学 by CrashCourse Statistics
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What is statistics
key words
field of statistics, statistics, descriptive, inferential, uncertainty, experimental design
video links
Questions to Answer
what can we do with statistics?
how to do statistics?
Interesting points
Ronald Fisher
experiment design made statistics a scientific discipline
field of statistics
study and practice of collecting and analyzing data
statistics
summary or fact of data
answer to all questions
It seems all questions if specific enough, can be addressed and answered by statistics
two types of tools
descriptive statistics:
- describing data (central tendency, spread from messay dataset) to understand data (some insights)
inferential statistics:
- extend insights or conclusions from sample (with descriptive statistics) to population
- it can test on two competing ideas or hypotheses
statistics and uncertainty
descriptive: make data digestible, even lose some detail
inferential: make decision despite uncertainty
The more powerful the tools are, the more damage if misused