PSY 200 Midterm: Exam 1
Document Summary
Population: a complete set of observations having one or more characteristics in common, could be people objects that the investigator is interested in. Constant: mathematical value that does not change e. g. (pi) Sample: a subset or incomplete set of observations taken from population, more defined and finite. Taking a sample in a random way with no bias, the sample would be different from one another. Sampling fluctuation: the variation from sample to sample that you will encounter when you select a sample from a population. Tends to decrease as the sample size increases. Chose a sample of size 99, one value is unchosen. Variable: represents different characteristics that can take on different (numeric) values . Will deal with two different kinds of variables: discrete variables: also called discontinuous, or qualitative variables. Discrete variables can take on only certain numeric values, has a finite value of any potential points on a number line. There are only certain values that are acceptable.
