Search for tag: "stat425"

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STAT425: Random effects model (2 of 2) duration 32 minutes 4 seconds STAT425: Random effects model (2 of 2) STAT425: Random effects model (2 of 2)	STAT425: Random effects model (2 of 2) In this video we discuss how to do inference in the random effects model using the Likelihood Ratio test and parametric bootstrap methods. stat425 random effects lrt parametric bootstrap From Lelys Bravo De Guenni 12 plays 0 Date of creation 5/1/2021 5:00 AM
STAT425: Random Effects Model (1 of 2) duration 29 minutes 40 seconds STAT425: Random Effects Model (1 of 2) STAT425: Random Effects Model (1 of 2)	STAT425: Random Effects Model (1 of 2) In this video we discuss the meaning of random factors vs. fixed factors. We also introduced random and mixed effects models and how to estimate the model parameters using maximum likelihood and… stat425 random effects mle rmle From Lelys Bravo De Guenni 17 plays 0 Date of creation 5/1/2021 5:00 AM
STAT425 R Examples: Experimental Design 1 (Paired… duration 24 minutes 53 seconds STAT425 R Examples: Experimental Design 1 (Paired… STAT425 R Examples: Experimental Design 1 (Paired t-test and blocking factors)	STAT425 R Examples: Experimental Design 1 (Paired t-test and blocking factors) In this video we re-visit the t-test for two independent and dependent samples and use the lm function with a blocking factor to calculate the t-test. We also discuss the randomized t-test. stat425 paired t-test randomized t-test blocking factor From Lelys Bravo De Guenni 52 plays 0 Date of creation 4/23/2021 5:00 AM
STAT425: Experimental Design 2 duration 46 minutes 53 seconds STAT425: Experimental Design 2 STAT425: Experimental Design 2	STAT425: Experimental Design 2 In this video we discuss the Completely Randomized Block Designs and the Latin squares design. We also discuss how to calculate the relative efficiency between two designs. stat425 completely randomized block designs relative efficiency latin squares From Lelys Bravo De Guenni 71 plays 0 Date of creation 4/23/2021 5:00 AM
STAT425 Experimental Design 1 (2 of 2) duration 12 minutes 3 seconds STAT425 Experimental Design 1 (2 of 2) STAT425 Experimental Design 1 (2 of 2)	STAT425 Experimental Design 1 (2 of 2) In this video we discuss cross-over experiments as a special case of matched pairs, and provide another example of randomization tests. stat425 crossover desing matched pairs randomization tests From Lelys Bravo De Guenni 35 plays 0 Date of creation 4/23/2021 5:00 AM
STAT425: Experimental Design 1 (1 of 2) duration 35 minutes 15 seconds STAT425: Experimental Design 1 (1 of 2) STAT425: Experimental Design 1 (1 of 2)	STAT425: Experimental Design 1 (1 of 2) In this video we introduce the components and steps of experimental design, randomization and introduce randomization tests. We also discussed matched pairs comparisons stat425 exterimental design matched pairs randomization From Lelys Bravo De Guenni 57 plays 0 Date of creation 4/23/2021 5:00 AM
STAT425: R examples: Two-way ANOVA models (Part… duration 24 minutes 31 seconds STAT425: R examples: Two-way ANOVA models (Part… STAT425: R examples: Two-way ANOVA models (Part 2) (additional cases)	STAT425: R examples: Two-way ANOVA models (Part 2) (additional cases) In this video we discuss two-way anova models when we have an unbalance case and we need to analyze the model factors using the Type III Sum of Squares. We also discuss the balanced case with n=1 (a… stat425 two-way anova unbalanced case tukey's additivity test From Lelys Bravo De Guenni 39 plays 0 Date of creation 4/19/2021 5:00 AM
STAT425: Two-way ANOVA Part 2 duration 32 minutes 33 seconds STAT425: Two-way ANOVA Part 2 STAT425: Two-way ANOVA Part 2	STAT425: Two-way ANOVA Part 2 In this video we discuss the two-way ANOVA model for the unbalanced case. We also discuss the balance case with 1 replication and the Tukey's additivity test for the interaction. stat425 unbalanced case two-way anova tukey's additivity test From Lelys Bravo De Guenni 60 plays 0 Date of creation 4/18/2021 5:00 AM
STAT425: Two-way ANOVA Part 1 (2 of 2) duration 29 minutes 27 seconds STAT425: Two-way ANOVA Part 1 (2 of 2) STAT425: Two-way ANOVA Part 1 (2 of 2)	STAT425: Two-way ANOVA Part 1 (2 of 2) In this video we discuss the ANOVA table and the F-tests for the two-way ANOVA model. We also discuss the estimation of factor level means when the interaction is not significant and the treatment… stat425 two-way anova f-tests interactions From Lelys Bravo De Guenni 75 plays 0 Date of creation 4/18/2021 5:00 AM
STAT425: Two-way ANOVA Part 1 (1 of 2) duration 39 minutes 8 seconds STAT425: Two-way ANOVA Part 1 (1 of 2) STAT425: Two-way ANOVA Part 1 (1 of 2)	STAT425: Two-way ANOVA Part 1 (1 of 2) In this video we describe the two-facto ANOVA models and discuss the difference between the cell means model and the factor effects model. We all discuss estimation in the two-factor ANOVA model. stat425 two-way anova cell means model factor effects model From Lelys Bravo De Guenni 82 plays 0 Date of creation 4/18/2021 5:00 AM
STAT425: One-way ANOVA models Part 2 (2 of 2) duration 15 minutes 49 seconds STAT425: One-way ANOVA models Part 2 (2 of 2) STAT425: One-way ANOVA models Part 2 (2 of 2)	STAT425: One-way ANOVA models Part 2 (2 of 2) In this video we continue discussing different methods to test one-factor level means including the Tukey's test and the Scheffe's test. stat425 mean comparison tukey's test scheffe's test From Lelys Bravo De Guenni 89 plays 0 Date of creation 4/4/2021 5:00 AM
STAT425: One-way ANOVA models Part 2 (1 of 2) duration 31 minutes 8 seconds STAT425: One-way ANOVA models Part 2 (1 of 2) STAT425: One-way ANOVA models Part 2 (1 of 2)	STAT425: One-way ANOVA models Part 2 (1 of 2) In this video we explain different ways of comparing the level means of a factor in a one-way ANOVA model, including contrasts. We discuss how to calculate the confidence intervals for the difference… stat425 mean comparison contrast pairwise test From Lelys Bravo De Guenni 114 plays 0 Date of creation 4/4/2021 5:00 AM
STAT425: One-way ANOVA models Part 1 (2 of 2) duration 30 minutes 44 seconds STAT425: One-way ANOVA models Part 1 (2 of 2) STAT425: One-way ANOVA models Part 1 (2 of 2)	STAT425: One-way ANOVA models Part 1 (2 of 2) In this video we talk about the properties of the One-way ANOVA model, model estimation and model Inference. We also discuss model diagnostics including the Levene's test for equality of… stat425 one-way anova model properties model diagnostics From Lelys Bravo De Guenni 110 plays 0 Date of creation 3/28/2021 5:00 AM
STAT425: One-way ANOVA models Part 1 (1 of 2) duration 39 minutes 6 seconds STAT425: One-way ANOVA models Part 1 (1 of 2) STAT425: One-way ANOVA models Part 1 (1 of 2)	STAT425: One-way ANOVA models Part 1 (1 of 2) In this video we explain the One-way ANOVA model and different versions of the model, including the mean model and the Factors effect model stat425 one-way anova means model factors effect model From Lelys Bravo De Guenni 117 plays 0 Date of creation 3/28/2021 5:00 AM
STAT425: A/B testing duration 23 minutes 58 seconds STAT425: A/B testing STAT425: A/B testing	STAT425: A/B testing In this video we give a brief introduction of A/B testing stat425 ab testing mean comparison randomization From Lelys Bravo De Guenni 106 plays 0 Date of creation 3/28/2021 5:00 AM
STAT425: Shrinkage Methods (2 of 2) duration 30 minutes 0 seconds STAT425: Shrinkage Methods (2 of 2) STAT425: Shrinkage Methods (2 of 2)	STAT425: Shrinkage Methods (2 of 2) In this video we discuss Ridge Regression and Lasso Regression. These two methods are also called penalized regression methods. They are useful when just a subset of the regression coefficients is… stat425 shrinkage methods ridge regression lasso regression From Lelys Bravo De Guenni 127 plays 0 Date of creation 3/21/2021 5:00 AM
STAT425: Shrinkage Methods (1 of 2) duration 41 minutes 7 seconds STAT425: Shrinkage Methods (1 of 2) STAT425: Shrinkage Methods (1 of 2)	STAT425: Shrinkage Methods (1 of 2) In this video we talk about Principal Components Regression. This method is useful to reduce the dimensionality of the predictors space and when the high number of predictors can cause collinearity… stat425 principal components regression shrinkage methods From Lelys Bravo De Guenni 154 plays 0 Date of creation 3/21/2021 5:00 AM
STAT425: Variable Selection duration 43 minutes 24 seconds STAT425: Variable Selection STAT425: Variable Selection	STAT425: Variable Selection In this video we discuss how to do variable selection in linear regression using testing-based methods and criteria-based methods. We also discuss different searching methods to come up with the best… stat425 variable selection testing-based methods criteria-based methods From Lelys Bravo De Guenni 171 plays 0 Date of creation 3/15/2021 5:00 AM
STAT425: AnCova Models (2 of 2) duration 28 minutes 6 seconds STAT425: AnCova Models (2 of 2) STAT425: AnCova Models (2 of 2)	STAT425: AnCova Models (2 of 2) We discuss ANCOVA models when the categorical variable has k-levels. We also discuss the sequential F-test for model comparison stat425 ancova models k-levels categorical variables From Lelys Bravo De Guenni 150 plays 0 Date of creation 3/13/2021 6:00 AM
STAT425: AnCova Models (1 of 2) duration 31 minutes 49 seconds STAT425: AnCova Models (1 of 2) STAT425: AnCova Models (1 of 2)	STAT425: AnCova Models (1 of 2) We discuss AnCova models including a categorical variable with two-levels. We also discuss the different models resulting form the general model with interaction. stat425 ancova models two-levels categorical variables From Lelys Bravo De Guenni 175 plays 0 Date of creation 3/13/2021 6:00 AM
STAT425: Non-parametric Regression duration 31 minutes 28 seconds STAT425: Non-parametric Regression STAT425: Non-parametric Regression	STAT425: Non-parametric Regression In this video we discuss Non-parametric regression methods: kernel estimators, smoothing splines and local polynomials stat425 non-parametric regression kernel estimators smoothing splines local polynomials From Lelys Bravo De Guenni 148 plays 0 Date of creation 3/8/2021 6:00 AM
STAT425: Regression Splines duration 36 minutes 51 seconds STAT425: Regression Splines STAT425: Regression Splines	STAT425: Regression Splines In this video we talk about regression splines and how to set the number of knots or degrees of freedom (df)to define the design matrix. We also discuss how to select the number of knots or df using… stat425 regression splines b-splines natural cubic splines From Lelys Bravo De Guenni 193 plays 0 Date of creation 3/6/2021 6:00 AM
STAT425: Polynomial Regression duration 42 minutes 57 seconds STAT425: Polynomial Regression STAT425: Polynomial Regression	STAT425: Polynomial Regression In this video we talk about polynomial regression and piece-wise polynomials. We also define Cubic Splines and Natural Cubic Splines. stat425 polynomial regression cubic splines natural cubic splines From Lelys Bravo De Guenni 204 plays 0 Date of creation 3/6/2021 6:00 AM
STAT425: Lack of Fit test duration 30 minutes 29 seconds STAT425: Lack of Fit test STAT425: Lack of Fit test	STAT425: Lack of Fit test In this video we talk about the Lack of Fit test in two cases: When the variance is known, and when the variance is unknown. stat425 lack of fit residual variance From Lelys Bravo De Guenni 221 plays 0 Date of creation 3/1/2021 6:00 AM

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