# STATISTICS:  Class Notes

Prof.  G. Battaly, Westchester Community College, Valhalla NY  (updated 04/28/2023)
All links with *** are videos

 Final Exam Preparation             Study Sessions Problems    More Help for the Final Exam:  Test #1 Preparation            Test #2 Preparation        3/23/2023 ***Importance of Textbook*** Submitting Material through Blackboard Crossword:  Chi-Squared, Mann-Whitney Chapter 1 Nature of Statistics         Ch 1 questions Chapter 2 ***2.1 Variables*** |  ***2.2 Organizing Qualitative Data*** 2.3 Organizing Quantitative Data      student height excel file ***2.3 Organizing Quantitative Data *** ** dotplot **        ** stem & leaf ** 2.4 - 2.5 Distribution Shapes ** Shapes of Distributions **  ** Misleading Graphs ** Chapter 3 3.1 Measures of Center **3.1 Measures of Center **     **3.1 Center-Part2 ** 3.2 Measures of Variation **3.2 Standard Deviation-Background **     **3.2 Stdev Compute ** 3.4 Five Number Summary; Box Plot **3.4 Quartiles, 5Number Sum **     **3.4 Boxplot ** 3.5 Samples, Populations, and z-scores ** Formula Summary, z-score ** Chapter 4 4.1 Probability Basics ** 4.1 Probability ** 4.2 Events ** 4.2 Events ** 4.3 Probability of Events ** 4.3 Rules of Probability ** 4.4&5 Contingency Tables; Conditional Probability 4.6 Independence Chapter 6 Normal Curve:  geogebra demo Area under Normal Curve:  geogebra demo Normal Distribution and the SNC:  **video of geogebra demo 6.1 Normal Distribution ***6.1 Normal Distributions-Part 1*** ***6.1 Normal Distributions-Part 2*** | 6.2 Area under Standard Normal Curve ***6.2 Area under Normal Curves-Part 1*** ***6.2 Areas under Normal Curves-Part2******6.2 Given Area, Find z or x*** 6.3 Normally Distributed Variables ***6. Normall Distributed Variables*** 6.4 Normal Probability Plots ***6.4 Normal Probability Plot*** Chapter 7 7.1 Sampling Distribution Of Mean ***7.1 Sample Mean - Heights*** ***7.1 Sample Mean - Yankees*** | 7.2 Mean and Standard Deviation of Sample Mean *** 7.2 Distribution of the Sample Mean*** 7.3 Sample Mean and Normal Distribution ***7.3 Sample Mean and Normal Distribution*** *****Video: PANDEMIC REVIEW***** Chapter 8 8.1 Point Estimate and CI *** 8.1 Point Estimate and Confidence Interval *** 8.2A Confidence Interval, Known Standard Deviation : ***  8.2 Z-interval Part 1 ***             ***  8.2 Z-interval Part 2 *** 8.2B Margin of Error and Sample Size ***:8.2 Margin of Error,Sample Size****** :8.2 Sample Size, 8.3 t-curve *** t-Curve comp. to SNC  geogebra demo with animation 8.3 Confidence Interval, Standard Deviation NOT known *** :8.3 t-Interval *** Chapter 9 9.1 Hypothesis Testing *** 9.1 Hypothesis Tests, 9.3 P-Value, 9.4 z-test *** 9.1 Hyp Tests, 9.3 P-Value, 9.4 ztest, 9.5 t-testl -pdf 9.2 & 9.3 Critical Value vs P-Value Approach p-Value and Science, 2019 9.4 Hypothesis Test:  1 mean, σ known 9.5 Hypothesis Test:  1 mean, σ NOT known ***Video: 9.5 t-test *** ### Study Session Ch 9, t-test  ### Chapter 10 Chapter 10 Content   pdf of  Course Content for Ch 10 10.1-10.3 Two Means: Pooled-t and Non-pooled t Overview ***10.1-10.3 Compare Pooled-t and Non-pooled t*** 10.1 Hypothesis Tests Comparing Two Means 10.2 Pooled t Test (equal σs) **Video: 10.1 2 sample tests, 10,2 pooled t Test (equal σs)** **Video: 10,2 pooled t Test continued** 10.3 Non-Pooled t Test (font face="Arial">σs NOT equal ) **Video: 10,3 NON-pooled t Test** Hypothesis Testing Puzzle 10.4 Mann-Whitney Test **Video: 10,4 Mann-WhitneyTest** 10.5 Paired t - Test **Video: 10,5 Paired-t Test**  **10,5 Paired-t Continued** **Video: 10,5 Paired-t Test Extra Problem** Two Sample Procedure Practice Sheet Chapter 13 Chi-Square Distribution  geogebra demo with animation 13.1&13.2 Chi-Square Tests **Video: 13.1 and 13.2 Chi-Square Test** 13.4 Chi-Square Independence Crossword:  Chi-Squared, Mann-Whitney Chapter 14 Linear Regression  geogebra demo 14.2 Linear Regression Equation ***Video: Ch 14 Intro to Regression***            ***Video:  14.2 Linear Regression*** 14.3 Coefficient of Determination ***Video: 14.3 Coef of Determination, 14.4 Correlation*** 14.4 Correlation Coefficient Chapter 15 15.4 Inferences in Correlation ***Video:  15.4 Correlation-t Test*** Chapter 16 F-Distribution geogebra demo with animation 16.1-16.3 ANOVA ***Video: 16.3 ANOVA*** ***Video: ANOVA-Table Only *** Chapter 11 11.2 Comparing Two Standard Deviations Review Which Procedure?

Last Updated   04/18/2020
By Prof. Battaly, http://www.battaly.com/
Email: merlin@pipeline.com