统计不要哭-教学课件.pptxVIP

STATISTICS WITHOUT TEARS;Introduction to Statistics;Statistical technique are used in a wide range of types of science and social research, including biostatistics, computer information technology, economics and political science. The following are some of the specialized disciplines which derived from the statistics Actuarial Science (Assessing risks for insurance financial markets) Biostatistics (Hospital treatment drugs) Data mining (Applying statistic and pattern recognition to discover knowledge from the data) Demography/Census Econometrics (statistical analysis of economic data) Energy Statistics Industrial Engineering (Process Control, Reliability, Quality Variability) Medical Statistics/ Epidemiology Sampling and surveying School or large scale test scores Sports Statistics;Johnson Chen, 2015;Statistics can be used “explain or described” in more detail about a set of data we observed or collected. It could be test scores in a math class, number of customers visited a store, heights and weights of a group of people and etc…..;Johnson Chen, 2015;Standard Deviation is an useful tool for us when we further analyze the average. It is technically the “Average” of the all deviation in the population or sample set. We can also using Standard Deviation to find out or better describe how our data are spread out in a distribution. For many application, knowing how a distribution spread out is far more important than just the compute the average (mean). ;The concept of standard deviation (S.D.) is perhaps best explained in a surfing scenario. While the average is like the sea level or water depth; the standard deviation is the difference between how tides are moving. As we know, surfer are not really interested in how deep the sea is, but they more interested to know instead how big the wave is (Difference between high and low tides). And the surfers love high deviation on the waves for sure! Normally, deviation takes on the value of the data set, so its relevan