Articles by R on Stats and R

COVID-19 in Belgium: is it over yet?

May 21, 2020 | R on Stats and R

Introduction New hospital admissions New confirmed cases Introduction This is a joint work with Prof. Niko Speybroeck and Angel Rosas-Aguirre. Belgium recently started to lift its lockdown measures initially imposed to contain the spread of the...
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One-proportion and goodness of fit test (in R and by hand)

May 12, 2020 | R on Stats and R

Introduction In R Data One-proportion test Assumption of prop.test() and binom.test() Chi-square goodness of fit test Does my distribution follow a given distribution? Observed frequencies Expected frequencies Observed vs. expected frequencies By hand One-proportion test Verification in R Goodness of fit test Verification in R Introduction In a ...
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COVID-19 in Belgium

March 30, 2020 | R on Stats and R

Introduction Top R resources on Coronavirus Coronavirus dashboard for your own country Motivations, limitations and structure of the article Analysis of Coronavirus in Belgium A classic epidemiological model: the SIR model Fitting a SIR model to the Belgium data Reproduction number \(R_0\) Using our model to analyze the outbreak if ...
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COVID-19 in Belgium

March 30, 2020 | R on Stats and R

Introduction Top R resources on Coronavirus Coronavirus dashboard for your own country Motivations, limitations and structure of the article Analysis of Coronavirus in Belgium A classic epidemiological model: the SIR model Fitting a SIR model to th...
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The 9 concepts and formulas in probability that every data scientist should know

March 2, 2020 | R on Stats and R

What is probability? 1. A probability is always between 0 and 1 2. Compute a probability 3. Complement of an event 4. Union of two events 5. Intersection of two events 6. Independence of two events 7. Conditional probability Bayes’ theorem Example 8. Accuracy measures False negatives False positives Sensitivity Specificity Positive predictive value Negative predictive value 9. Counting techniques Multiplication ...
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The 9 concepts and formulas in probability that every data scientist should know

March 2, 2020 | R on Stats and R

What is probability? 1. A probability is always between 0 and 1 2. Compute a probability 3. Complement of an event 4. Union of two events 5. Intersection of two events 6. Independence of two events 7. Conditional probability Bayes’ theorem Example 8. Accuracy measures False negatives False positives Sensitivity Specificity Positive predictive value Negative predictive value 9. Counting techniques Multiplication ...
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Student’s t-test in R and by hand: how to compare two groups under different scenarios

February 27, 2020 | R on Stats and R

Introduction Null and alternative hypothesis Hypothesis testing Different versions of the Student’s t-test How to compute Student’s t-test by hand? Scenario 1: Independent samples with 2 known variances Scenario 2: Independent samples with 2 equal but unknown variances Scenario 3: Independent samples with 2 unequal and unknown variances Scenario 4: Paired samples where the variance ...
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