Slide 1The t -Distribution Estimating a Population Mean Slide 2 t -Distribution When sample sizes are sometimes small, and often we do not know the standard deviation of…

Slide 1Descriptive Statistics Calculations and Practical Application Part 2 1 Slide 2 Content Normal Z distribution Z Score Calculation and Application Z and t distributions…

Slide 1Estimation of Means and Proportions Slide 2 Slide 3 Concepts Estimator: a rule that tells us how to estimate a value for a population parameter using sample data Estimate:…

Slide 1“Students” t-test Slide 2 Recall: The z-test for means The Test Statistic Slide 3 Comments The sampling distribution of this statistic is the standard Normal distribution…

Slide 1 Example: Sampling distributions The manufacturer admits that St. John’s Wort capsules have a 5% probability of being defective (containing the wrong amount of active…

Slide 1Last bits of inferential statistics Slide 2 Check in Proposal DRAFT due Tuesday Research in media assignment Tuesday Quiz Tuesday the 29 th –Will cover statistics…

Slide 1 Linear Regression Exploring relationships between two metric variables Slide 2 Correlation The correlation coefficient measures the strength of a relationship between…

Slide 1 Inferential Statistics Confidence Intervals and Hypothesis Testing Slide 2 Samples vs. Populations Population –All of the objects that belong to a class (e.g. all…

Slide 1 EDUC 200C Section 5–Hypothesis Testing Forever November 2, 2012 Slide 2 Goals Quick review of hypothesis testing Confidence intervals Stata Practice Problem Questions?…