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There are many descriptions of sphericity, but few of them are truly understandable. I explain what sphericity is in an "intuitive" way, ...
YouTube-how2stats
What is sphericity?
How Wikipedia defines sphericity
Independent samples t-test formula
What is homogeneity of variance
Dependent sample t-test formula
What is the covariance?
What if you have 3 within-subject vector means to compare?
Homogeneity of sum of variances and covariance assumption
Within-subjects ANOVAs assume sphericity, but what is sphericity exactly? In this video, I provide a very intuitive demonstration of ...
Dataset with perfect sphericity
One-way within-subject ANOVA
One-way within-subject ANOVA with 3 levels
Standard error of paired sample t-tests
Covariance matrix
Running a paired sample t-test in SPSS
This video demonstrates how to calculate and interpret Mauchly's test of sphericity with Repeated Measures ANOVA in SPSS. Methods of how to ...
YouTube-Dr. Todd Grande
Variance between groups
Conducting Repeated Measures ANOVA
Entering the dependent variable
Repeated measures dialog
What can we do if we violate the assumption of sphericity?
Interpreting Greenhouse-Geisser correction
Test for Within-Subjects Effects
Multivariate analysis of variance (MANOVA)
From Chapter 8 of my *free* textbook: How2statsbook. Download the chapters here: www.how2statsbook.com More chapters to come.
YouTube-how2statsbook
Introduction
Interpreting Mauchly's Test of Sphericity
Interpreting Epsilon
What is Spherocity?
Note: For sphericity assumption in the Mauchly's test of sphericity, if it above 0.05 use the sphericity assumed assumption in the Within ...
YouTube-Dr. Darren Edwards
Example of a One-Way Anova with Three Conditions in a Repeated Measures Design
Labels
Normality Plots
Histogram
Descriptive Statistics
Observed Powers
Degrees of Freedom
... how to run a complex within subjects ANOVA in SPSS and analyse an interaction. It also has a section on violating the assumption of sphericity.
YouTube-Statistics Guides with Prof Paul Christiansen
Analysis guide
Setting up the within-subject factors
Assigning variables to conditions
Descriptive statistics table
Interpreting the table
Main effect picture type
Interpreting p-values
Pair samples t-test
Interpreting the output
Summary
In this episode, I explain how to complete a priori power analyses for Repeated Measures ANOVA. There are three separate tests.
YouTube-Alexander Swan, Ph.D.
Intro
RM ANOVA Between-subjects effect
RM ANOVA within-subjects effect
RM ANOVA within-between interaction
This video shows you how to run a mixed ANOVA in SPSS and produce comparisons for an interaction, guidance on writing up the analysis is ...
Dependent variable
Running the mixed ANOVA
Box's test
Explanation of ANOVA
Levene's test
Post-hoc analysis
Editing the mixed ANOVA syntax
Post-test analysis
Comparing means
Effect sizes
380K views · 9:10 · Go to channel · Mauchly's Test of Sphericity with Repeated Measures ANOVA in SPSS. Dr. Todd Grande•71K views · 8:12 · Go to ...
YouTube-Wouter SMCR
9:10 · Go to channel · Mauchly's Test of Sphericity with Repeated Measures ANOVA in SPSS. Dr. Todd Grande•71K views · 5:04 · Go to channel ...
One important assumption about the Independent-Samples t Test is that the variances in the sample groups are approximately equal. We assume ...
YouTube-Research By Design
Meaning of Homogeneity of Variance
Levene's Test for Homogeneity of Variance
Null Hypothesis for Levene's Test
Interpreting Levene's Test
Interpreting Levene's Test Results
When to use Levene's Test
Levene's Test Example
Independent Samples T-Test
Interpreting Degrees of Freedom
Above clouds I assume... ... Despite the large sphericity, there is no glare ... It can be assumed that they were taken there from the factory in the early 2000s.
Russian Watches
... ANOVA and Linear Regression. Brandon Foltz•29K views · 3:08. Go to channel · V8.5 - Mauchly's Test of Sphericity in SPSS. how2statsbook•9.1K ...
YouTube-Prof. Rani UI
Porosity can be determined from a relationship if we know the bulk density and particle density (assumed to be 2.65 g/cubic cm).
YouTube-DirtArtful
This video shows you how to do a complex between subjects ANOVA in SPSS and write up the results. It also shows you how you can produce ...
What is a complex ANOVA?
Analyzing data
Descriptive statistics
Analyzing the output
Total score
Test of between-subject effects
Interaction between two independent variables
Color level main effect
Profile plots
Reporting non-significant results
This video demonstrates how to conduct and interpret a one-way MANOVA with two dependent variables in SPSS. Methods for testing the ...
What is a MANOVA?
What does MANOVA do?
Independent Variables
Testing for outliers with a linear regression
Sorting the Mahalanobis Distance
Analyzing the MANOVA
Interpreting Levene's Test of Equality of Variances
Multivariate test results
Interpretation of Results
A homework exercise from The Pyzdek Institute Lean Six Sigma Black Belt course requires that data be tested for equality of variances.
- YouTube-ThomasPyzdek
Worked solution for Question 5, Chapter 2 (available as free download at https://www.particles.org.uk/particle_technology_book/index.htm) in ...
YouTube-Richard Holdich
Why is specific surface area important?
Calculation of specific surface area per unit volume
Multiplying by the number of particles
Alternatives to frequency
Spreadsheet solution
Relative mass fractions
Conclusion
Equivalent Spherical Diameter
From Chapter 16 of my *free* textbook: How2statsbook. Download the chapters here: www.how2statsbook.com More chapters to come.
Null Hypothesis
Interpreting Results
Discussion of Mean Ranks
Summary of Results