PSYC 3000 Lecture Notes - Lecture 2: Interquartile Range, Simple Random Sample, Kurtosis

• School: Carleton University
• Department: Psychology
• Course: PSYC 3000
• Professor: Zhigang Wang

Document Summary

Fundamental concepts will be on midterms and final. Descriptive statistics summarize and describe group of numbers (mean, median, mode) Inferential statistics try to infer information about population using information gathered by sampling (when you generalize from sample to population) Sometimes you can see descriptive inferential statistics (like stats can, you are still doing mean med and mode and want to generalize the results to a population) Population: the complete set of data elements is termed the population. (large, small; finite or infinite) Finite population means we can count each unit of population (stats canada we know how many people per address and how many people total) Infinite population (or hypothetical / theoretical population) it is a population we think in theory. Statistics in this class only applicable to infinite populations. Nomadic assumption population based on theories if their theories are correct then results can be trusted. Sample: a sample is a portion of a population selected for further analysis.