Outliers-Part 2:Finding Outliers in a univariated way

Series: Outlier Detection

Method 1: Sorting Your Datasheet to Find Outliers Method 2: Graphing Your Data to Identify Outliers Histogram Boxplot Adjusted boxplot (Hubert and Vandervieren, 2008) Method 3: Using Z-scores to Detect Outliers Z-Score pros: Z-Score cons: Method 4: Using the Interquartile Range (IRQ) to Create Outlier Fences Method 5: Percentiles scores function from {outliers} packages Method 6: Hampel filter Method 7: Finding Outliers with Hypothesis Tests Grubbs’ test Dixon’s test Rosner’s test Challenges of Using Outlier Hypothesis Tests: Masking and Swamping Hi, I’m the here-bot cat!

November 3, 2020

Outliers-Part 1:Causes, Philosophy and General Rules

Series: Outlier Detection

What are Outliers? Causes for Outliers Types of Outliers Philosophy about Finding Outliers General Rules Hi, I’m the here-bot cat! Use me to find your way in your website. Here I am: content/blog/outlier-series/01-Outliers-part1/index.html Here is my R Markdown source file: blog/outlier-series/01-Outliers-part1/index.Rmd You’ll want to edit this file, then re-knit to see the changes take effect in your site preview. To remove me, delete this line inside that file: {{< here >}}

November 2, 2020

Introducing Tidyverse-Part 2: %>%, the Forward Chaining

Figure 1: Pipe Operator Hi, I’m the here-bot cat! Use me to find your way in your website. Here I am: content/blog/2020-05-22-pipe-forward-chaining/index.html Here is my R Markdown source file: blog/2020-05-22-pipe-forward-chaining/index.Rmd You’ll want to edit this file, then re-knit to see the changes take effect in your site preview. To remove me, delete this line inside that file: {{< here >}} My content section is: blog My layout is: single-sidebar Images in this page bundle: /blog/2020-05-22-pipe-forward-chaining/featured.

May 22, 2020

Introducing Tidyverse-Part 1:Tidy Data

What is Tidy data？ Why is it important? Fixed variable vs. Measured variable Is such a data set tidy? Example 1: Example 2: Example 3: Code Examples Traditional measurement testing dataset Hi, I’m the here-bot cat! Use me to find your way in your website. Here I am: content/blog/2020-05-09-tidy-data/index.html Here is my R Markdown source file: blog/2020-05-09-tidy-data/index.Rmd You’ll want to edit this file, then re-knit to see the changes take effect in your site preview.

May 9, 2020

Parallel Analysis: Determining the Dimensionality of Data

window.xaringanExtraClipboard(null, {“button”:" Copy Code",“success”:" Copied!",“error”:“Press Ctrl+C to Copy”}) WHAT IS PARALLEL ANALYSIS METHODOLOGY PARALLEL ANALYSIS IN R Recently, my colleague asked me to review a state assessment tech report. In the tech report, a section-“Parallel Analysis” really caught my eyes. I have done parallel analysis multiple times in the past. However, I have never thought about this topic in a systematical way. It is always a good memory refreshing opportunity.

April 13, 2020