STATS 2B03 Chapter Notes - Chapter 7: Null Hypothesis, Type I And Type Ii Errors, Test Statistic

• School: McMaster University
• Department: Statistics
• Course: STATS 2B03
• Professor: Aaron Childs

Document Summary

Purpose of hypothesis testing is to aid the clinician, researcher, or administrator in reaching a conclusion concerning a population by examining a sample from that population. Hypothesis may be defined simply as a statement about one or more populations. Research hypothesis is the conjecture or supposition that motivates the research leading to statistical hypotheses. Statistical hypotheses are hypotheses that are stated in such a way that they may be evaluated by appropriate statistical techniques. Data: the nature of the data that form the basis of the testing procedures must be understood, since this determines the particular test to be employed. Assumptions: a general procedure is modified depending on the assumptions. The same assumptions that are of importance in estimation are important in hypothesis testing. Including assumptions about the normality of the population distribution, equality of variances, and independence of samples.