Stor 155, Section 2, Last Time Inference for Regression –Least Square Fits –Sampling distrib’ns for slope and intercept Regression Tool –Gave many useful.
Last Time Q-Q plots –Q-Q Envelope to understand variation Applications of Normal Distribution –Population Modeling –Measurement Error Law of Averages –Part.
Stor 155, Section 2, Last Time Hypothesis Testing –Assess strength of evidence with P-value P-value interpretation: –Yes – No –Gray – level –1 - sided.
Last Time Hypothesis Testing –Yes – No Questions –Assess with p-value P[what saw or m.c. | Boundary] –Interpretation –Small is conclusive –1-sided vs.
Stor 155, Section 2, Last Time
Stat 31, Section 1, Last Time Inference for Proportions –Hypothesis Tests 2 Sample Proportions Inference –Skipped 2-way Tables –Sliced populations in 2.
Stat 31, Section 1, Last Time Statistical Inference Confidence Intervals: –Range of Values to reflect uncertainty –Bracket true value in 95% of repetitions.
Stat 155, Section 2, Last Time Numerical Summaries of Data: –Center: Mean, Medial –Spread: Range, Variance, S.D., IQR 5 Number Summary & Outlier Rule Transformation.
Last Time Central Limit Theorem –Illustrations –How large n? –Normal Approximation to Binomial Statistical Inference –Estimate unknown parameters –Unbiasedness.
Stat 31, Section 1, Last Time
Last Time Hypothesis Testing –1-sided vs. 2-sided Paradox Big Picture Goals –Hypothesis Testing –Margin of Error –Sample Size Calculations Visualization.
Stat 155, Section 2, Last Time Binomial Distribution –Normal Approximation –Continuity Correction –Proportions (different scale from “counts”) Distribution.