Chapter 8: Present to Persuade (Pg. 177-192)

When it’s time to talk, don’t read the picture.

Hans Rosling’s Idea Discussion

Vox’s Chart discussion

I worry that Scott has oversold not explaining the chart

• What are your thoughts?

Why does height measure health?

• Let’s plot each child’s height by their age.
• What can we discern about each child?
• What can we discern about each country?

Understanding Z-scores

• How can Z-scores be a measure of health?

\[Z = \frac{x - \mu}{\sigma}\]

Let’s check the z-score calculations of our data

• Calculated Fields
• Plotting LAZ by agedays

Children’s heights

1. One slide should explain what a z-score is and how it is calculated for our graphics.
   

2. One slide should show height adjusted z-scores (HAZ) for a few healthy and a few unhealthy children from each gender over all the times using the MAL-ED data.
   

3. 1-2 Slides about the health of the children at 365 days (1-year) for multiple countries.

   • One chart should show the distribution of heights for children from at least 4 countries at ~365 days.
   • One chart should have visualizations of the health of the children at ~365 days for each country (height adjusted z-scores).

4. Take the time to explain your concerns about the health of the children of the study based on their z-scores.

5. One slide should show a plot of the heights of the dutch children over time. Take the time to describe the key takeaways about their growth.