Hi everyone. It’s been a long while since my last post here. Today, instead of doing an usual review, I would be sharing some things about the nature of MAL (myanimelist.net)’s anime database.
I think most deeply-invested fans of anime medium would at least heard of MAL, which is basically an online site where you can update what you’ve watched on your account. While there are similar types of sites, like hummingbird and anilist, myanimelist remains as the the site with the biggest user number. To give but an example, the most popular anime on MAL, Death Note, have as many as 460,000 members! With such a big sample of users scores, we can do some basic calculations to know more about the parameters of the population of MAL scores.
I have extracted all MAL data from this site http://test.animeadvice.me/, which is a program that someone else built.
Distribution of All Anime on MAL database
By all anime, I meant anime that is on MAL’s database and with more than 50 user scores. There are 6922 anime in total at my time of data extraction.
Having copy and pasted all those data entries into excel, I can easily calculate the average and standard error of *MAL score of the entire anime database.
Average = 6.87
Median = 6.87
Standard Error = 0.76
So basically, the distribution of MAL’s anime database scores is a normal distribution, with a slight negative skew.
*MAL score is calculated in Bayesian average.
Weighted Rank (WR) = (v / (v + m)) * S + (m / (v + m)) * C
where S = average score of anime; C = average score of entire anime database; v = number of votes for the anime; m = minimum votes (50 votes)
Average Year Aired of the Most Popular Anime
Are people only into new anime, or are people still immersed in the nostalgia of past glories? I also find it worthwhile to investigate into the average year aired for some of the most popular anime (on MAL).
I have computed the average year and standard deviation of the top50, top100, top250, and top500 most popular anime on MAL.
The current time would be formatted as 2014.5 (2014 June). This means that the average airing time of top50 – top 500 are 7 to 8 years in the past. Whether this means that MAL users are obsessed with new anime, or are they overly fond of the old anime, it is entirely up to your discretion.