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What does the course cover?
Урок 2.00:04:03
Understanding the difference between a population and a sample
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The various types of data we can work with
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Levels of measurement
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Categorical variables. Visualization techniques for categorical variables
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Numerical variables. Using a frequency distribution table
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Histogram charts
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Cross tables and scatter plots
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The main measures of central tendency: mean, median and mode
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Measuring skewness
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Measuring how data is spread out: calculating variance
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Standard deviation and coefficient of variation
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Calculating and understanding covariance
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The correlation coefficient
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Practical example
Урок 16.00:01:01
Introduction to inferential statistics
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What is a distribution?
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The Normal distribution
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The standard normal distribution
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Understanding the central limit theorem
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Standard error
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Working with estimators and estimates
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Confidence intervals - an invaluable tool for decision making
Урок 24.00:08:02
Calculating confidence intervals within a population with a known variance
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Confidence interval clarifications
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Student's T distribution
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Calculating confidence intervals within a population with an unknown variance
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What is a margin of error and why is it important in Statistics?
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Calculating confidence intervals for two means with dependent samples
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Calculating confidence intervals for two means with independent samples (part 1)
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Calculating confidence intervals for two means with independent samples (part 2)
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Calculating confidence intervals for two means with independent samples (part 3)
Урок 33.00:10:07
Practical example: inferential statistics
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The null and the alternative hypothesis
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Establishing a rejection region and a significance level
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Type I error vs Type II error
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Test for the mean. Population variance known
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What is the p-value and why is it one of the most useful tools for statisticians
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Test for the mean. Population variance unknown
Урок 40.00:05:19
Test for the mean. Dependent samples
Урок 41.00:04:23
Test for the mean. Independent samples (Part 1)
Урок 42.00:04:27
Test for the mean. Independent samples (Part 2)
Урок 43.00:07:17
Practical example: hypothesis testing
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Introduction to regression analysis
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Correlation and causation
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The linear regression model made easy
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What is the difference between correlation and regression?
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A geometrical representation of the linear regression model
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A practical example - Reinforced learning
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Decomposing the linear regression model - understanding its nuts and bolts
Урок 51.00:05:25
What is R-squared and how does it help us?
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The ordinary least squares setting and its practical applications
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Studying regression tables
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The multiple linear regression model
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The adjusted R-squared
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What does the F-statistic show us and why do we need to understand it?
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OLS assumptions
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A1. Linearity
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A2. No endogeneity
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A3. Normality and homoscedasticity
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A4. No autocorrelation
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A5. No multicollinearity
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Dummy variables
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Practical example: regression analysis