IB Biology Testing for Association using the Chi Squared Test

Dubay presents a virtual investigation on the use of data from random quadrat sampling to determine association between two plant species.
*There is a typo at 5:25, the correct formula is used but the written formula is incorrect. It should be (Row total/combined total) X column total.
** 1.88 in the contingency table at 5:50 should be 9.88 but this error was not carried forward.
The links mentioned a

[bertrandhorne]

Hello Sir,
I am from India, a young IB Biology teacher, thank you for taking the time to create this video, I have a doubt in positive and negative association. How do you say it is positively associated when Sunflower present/gazania absent box has high number? and vice versa?

[dubayguru]

This was assessed in the May 2018 exams