PSYC 406 Lecture Notes - Lecture 4: Statistical Inference, Analysis Of Variance, Situation Two
30 Sep 2016
School
Department
Course
Professor
Document Summary
Descriptive stats: used to summarize and describe info. about a sample from a study. -any way to use numbers to try to summarize info. Sample- not all the students in the world(ex. Pop. refers to a particular group of people(ex. all students in canada between 18-30)- but you cannot interview every student so you need to look at a sample that is like the population. Ex. "s : % of students graduated(2000/2005/2010)-% rate of graduation is going up. Tells us maybe students are getting smarter, maybe teachers are doing a better job- some info. here we can try to make inferences about but we shouldn"t because it is descriptive. Crimes per 100 population/age- non violent and violent crimes- used non- descriptively, it seems that younger people are responsible for most crimes. - People over the age of 60 commit little crime. Inferential statistics: go one step further than descriptive- try to make inferences about the pop. from the sample.
