Chi-squared test

https://www.youtube.com/watch?v=WXPBoFDqNVk

How to---perform a chi-square test (by hand)

https://www.youtube.com/watch?v=V4SRgabFbz0

Chi-square tests for count data: finding the p-value

https://www.youtube.com/watch?v=HwD7ekD5l0g

Simple explanation of chi-square

https://www.youtube.com/watch?v=VskmMgXmkMQ&t=13s

Chi squared test

https://www.youtube.com/watch?v=qYOMO83Z1WU