Lecture 9 - Introduction Slide
	Review of hypothesis testing
	Statistical Tests
	Statistical Tests, cont.
	Analysis of Continuous Data: 1-sample Z-test1-sample t-test 2-sample t-test Paired t-test
	Example: One-sample Z-test
	z distribution
	t-tests
	Comparison of normal vs. t distributions
	Properties of the t-distribution
	Example: One-sample t-test
	t-distribution, 14 df
	Two-sample t-test
	Example: two-sample t-test
	t-distribution, 40 df
	Paired t-test
	Example: Paired t-test
	Example: paired t-test (cont’d)
	What if your data are not normally distributed and your sample size is relatively small?
	Analysis of Nominal Data: Chi-square test
	Properties of the Chi-square Distribution
	Chi-square test
	Example: Chi-square test
	Hypotheses for Chi-square example
	Example: Chi-square test, cont. 1
	Example: Chi-square test, cont. 2
	Example: Chi-square test, cont. 3

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