Summary research in biomedical sciences part 2
Lecture 5 – Statistical techniques 1 Z and Chi-square tests
Understand when, why and how to conduct
• a one-sample z-test
• a chi-square-test of goodness of fit
• a two-sample z-test
• relative risk and odds ratio
• a chi-square-test for two-way tables
A statistical test
• whether a hypothesis about the population
• may or may not be supported by the results of the sample
Test Statistic = (point estimate –expected value)/SE
Parametric tests
• Z and Chi-square tests
• T-tests
• Correlation tests
Non-parametric tests
,
,
, Example:
• Alternative to one-sample z-test: chi-square goodness of fit test
Lecture 5 – Statistical techniques 1 Z and Chi-square tests
Understand when, why and how to conduct
• a one-sample z-test
• a chi-square-test of goodness of fit
• a two-sample z-test
• relative risk and odds ratio
• a chi-square-test for two-way tables
A statistical test
• whether a hypothesis about the population
• may or may not be supported by the results of the sample
Test Statistic = (point estimate –expected value)/SE
Parametric tests
• Z and Chi-square tests
• T-tests
• Correlation tests
Non-parametric tests
,
,
, Example:
• Alternative to one-sample z-test: chi-square goodness of fit test
