3.1 Introduction to graphs

After reviewing 2.3 2.4 2.5, the favorite foods survey data was used to introduce circle charts, column charts, and Pareto charts. The mode from a frequency table was also covered.


Following this was a presentation on population census data and enrollment by state using circle charts.


This could benefit from having the students make a circle chart and column chart from the college data on their own. The errant census data should be omitted. The census data, or lack thereof, has become a distraction from the statistics.

3.2 Nominal level histograms

Nominal level histograms was done using favorite colors on day two of charts and graphs. The class opened with working 3.1 on a cell phone. This is now more necessary than in the past as the Make a copy operation is failing on Android. On Android the copy on link has always failed, leading to a View only spreadsheet. In the past Make a copy provided an editable copy. This is no longer the case. The hack around is to manually drag and select the data, copy, generate a new blank spreadsheet in Google Sheets, and then paste the data into the new sheet. At least this is the process necessary when working on my device and generating the copy in my personal Google account on the same device. Whether students working wholly within the Workspace on their college accounts encounter this is unknown at this time. 


Favorite colors had an eight term trend that suggested a swing back to black was occurring among the students. This gave pause to the morning outfit. Blue over black or black over blue? 



Despite the trend towards black, the decision was made to go with blue over black. The long term statistics still favored blue over black, green underneath, followed by red and, this term, brown socks acquired in Guam over Christmas. Red socks might be a better choice.

This term blue bested black. There was, however, a three-way tie at number two including purple (sixth rank overall) and pink (ninth rank overall). Pink vaulting into number two with three votes is unusual and hasn't occurred in a single section since spring 2012. That term there were three sections of statistics, pink garnering 7 votes across three sections. 

This term green was a non-starter and red was in a two-way tie for third rank. White continues to do well - back in 2016 white would see a four term run of not appearing on the favorite colors list (n = 133 students). 

Going forward blue has to remain over black - that remains the longer term choice. Close to an even split, but the edge remains with blue. And being wrong is as useful as being right. Always in statistics class. There are no 100% confidence intervals. 

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