bivariate normal distribution - SERP Analysis

https://www.probabilitycourse.com/chapter5/5_3_2_bivariate_normal_dist.php

https://mathworld.wolfram.com/BivariateNormalDistribution.html

https://en.wikipedia.org/wiki/Multivariate_normal_distribution

https://www.reddit.com/r/AskStatistics/comments/memlr0/im_an_idiot_could_someone_kindly_explain_to_me/

http://athenasc.com/Bivariate-Normal.pdf

https://data140.org/sp18/textbook/notebooks-md/24_01_Bivariate_Normal_Distribution.html

https://www.youtube.com/watch%3Fv%3D2xHeg6n89tU

https://online.stat.psu.edu/stat505/lesson/4/4.2

https://www.cs.columbia.edu/~djhsu/ML/lectures/bivariate.pdf