Index > Decision Analysis > 2021-02-04: Graphics and Estimation
In class, continuing the benefit-cost analysis of last class
The cost of a chevy volt and a similarly sized gas car are compared. Additionally, the fuel costs and the lifetimes of the cars are considered.
“Forgetting variables, and adding things that should have been subtracted, are the most common mistakes” - Prof.
It’s important to look at the data points that don’t have problems, in addition to the ones that do.
When conveying data in graphical form, be efficient. Remove non-data ink.
A good information graphic draws you in, and entices you to make comparisons. A bad information graphic inspires dread of the effort of understanding upon first glance.
Make figures simple and readable.
Prof.’s advice for making better excel plots:
Say we need a number:
Frequently, a decent guess is close enough.
Index > Decision Analysis > 2021-02-04: Graphics and Estimation