📽️ Stage 4 · The Data Toolkit Briefing

~10 minutes · revealjs presentation from a .qmd

🗺️ The quest so far

We started with a .qmd file and a story.

We explored data — distributions, correlations, comparisons by major.

We fitted a model, evaluated it, and checked the diagnostics.

All of it lives in one file. All of it re-runs with one command.

Why this workflow changes things

Before

• Analyse in R
• Copy tables into Word
• Rebuild charts in PowerPoint
• Update manually when data changes
• Hope nothing drifted

After

• Write one .qmd
• Render to report
• Render to slides ← you are here
• Render to website
• Update once, everywhere

The five quest stages — complete

#	Stage	Skill unlocked
1	🧭 Demo Guide	YAML · chunks · inline R
2	🔍 EDA	Distributions · correlations · box plots
3	🔬 Tidymodels	Model · metrics · diagnostics
4	📽️ Slides	revealjs · columns · fragments
5	🏆 Final Chamber	All fragments → Golden Toolkit

A live code slide

library(tidyverse)
read_csv("data/treasure_hunt.csv", show_col_types = FALSE) |>
  group_by(major) |>
  summarise(avg = round(mean(final_treasure), 1)) |>
  arrange(desc(avg))

# A tibble: 5 × 2
  major        avg
  <chr>      <dbl>
1 OMIS        94  
2 Marketing   83.2
3 Management  77.6
4 Accounting  76.8
5 Finance     71.8

The code ran inside the slide. No copy-paste. No drift.
Same code. Same data. Same model. Different output format.

Revealjs features worth knowing

Navigation

• Space — next slide
• ← → — step through
• F — fullscreen
• S — speaker notes

Quarto syntax

• .fragment — progressive reveal
• columns — side-by-side layout
• background-color — slide background
• theme: — one word reskins everything

Themes you can swap instantly

Change one word in the YAML → the whole deck reskins:

simple · sky · moon · night · serif · blood · white · league

Try it live

Change theme: simple to theme: moon and render.
Takes under 30 seconds.

What slide would you add?

Which major at NIU has the most to gain from data literacy?

What is one finding from the EDA you would want a hiring manager to see?

What would your slide look like?