Publications by Harold Nelson

Regression 2

15.04.2024

Regression 2 Harold Nelson 4/3/2022 Setup library(tidyverse) ## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ── ## ✔ dplyr 1.1.4 ✔ readr 2.1.5 ## ✔ forcats 1.0.0 ✔ stringr 1.5.1 ## ✔ ggplot2 3.5.0 ✔ tibble 3.2.1 ## �...

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Bootstrap CI

12.04.2024

Bootstrap CI Harold Nelson 2024-04-12 Setup library(tidyverse) ## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ── ## ✔ dplyr 1.1.4 ✔ readr 2.1.5 ## ✔ forcats 1.0.0 ✔ stringr 1.5.1 ## ✔ ggplot2 3.5.0 ✔ tibble 3.2.1 ## ...

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Permutation

12.04.2024

Permutation Harold Nelson 2024-04-12 Setup library(tidyverse) ## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ── ## ✔ dplyr 1.1.4 ✔ readr 2.1.5 ## ✔ forcats 1.0.0 ✔ stringr 1.5.1 ## ✔ ggplot2 3.5.0 ✔ tibble 3.2.1 ## �...

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Tidymodels Classification

08.04.2024

Tidymodels Classification Harold Nelson 2024-04-08 Setup Load tidyverse and tidymodels Load the dataframe cdc2. Solution library(tidyverse) ## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ── ## ✔ dplyr 1.1.4 ✔ readr 2.1.5 ## ✔ forcats 1....

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The Bootstrap

08.04.2024

The Bootstrap Harold Nelson 2024-04-07 Setup library(tidyverse) ## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ── ## ✔ dplyr 1.1.4 ✔ readr 2.1.5 ## ✔ forcats 1.0.0 ✔ stringr 1.5.1 ## ✔ ggplot2 3.5.0 ✔ tibble 3.2.1 ##...

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The t test

03.04.2024

The t test Harold Nelson 2024-04-03 The t test We can use the t test to test hypotheses about the mean value of a variable. Setup library(tidyverse) ## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ── ## ✔ dplyr 1.1.4 ✔ readr 2.1.5 ## ✔ for...

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Tidymodels Regression

02.04.2024

Tidymodels Regression Harold Nelson 2024-04-02 Setup Load tidyverse and tidymodels Load the dataframe OAW2309. Solution library(tidyverse) ## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ── ## ✔ dplyr 1.1.4 ✔ readr 2.1.5 ## ✔ forcats 1.0...

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Hypothesis Testing

27.03.2024

Hypothesis Testing Harold Nelson 2024-03-27 Hypothesis Testing Hypothesis testing is an alternative to confidence interval construction. Confidence intervals are easy to understand. You use a confidence interval to make an expanded statement on an estimate you’ve made. Here’s my estimate, and here’s how good I think it. My estimate is WWW ...

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Regression 2

25.03.2024

Regression 2 Harold Nelson 4/3/2022 Setup library(tidyverse) ## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ── ## ✔ dplyr 1.1.4 ✔ readr 2.1.5 ## ✔ forcats 1.0.0 ✔ stringr 1.5.1 ## ✔ ggplot2 3.4.4 ✔ tibble 3.2.1 ## �...

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Regression 3

25.03.2024

Regression 3 Harold Nelson 4/5/2022 Setup library(tidyverse) Dummy Variables A dummy variable has only two values, 0 and 1 or (FALSE or TRUE). This device is used in regression to mark the presence or absence of a condition. If one of these is used in the list of independent variables, the value of its coefficient is the amount added to the pre...

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