macman76
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Last Active 09-25-20 9:08 pm
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If You Weighed it Differently

Hello again, back with some more numbers. My previous list appeared to be widely hated, except for a handful of staff. Criticisms included: its general dumbness and somehow, concurrently the degree of difficulty in understanding the information. This time I didn’t fix the dumbness, but I did make it less complicated. So, I was reading the other day that imdb gives special weight to more trusted users and trims outliers in determining what imdb rating is displayed for movies. This list is an exercise in weighting and transforming the displayed rating of albums in the sputnik database. It is my belief that relative to other sites, sputnik is not influenced by conflicts of interest or industry pressure. Instead, as is the case with other sites, it can be influenced by the “heard” and probably specifically by a few strongly influential taste-makers. People will choose to listen to an album based on a rating or a strong review (this is what I do when it comes to bands I haven’t listened to before) and they may use a review or the rating as a baseline for determining their own rating (again, guilty). As a case study, I present each of the following albums with a 5% trimmed mean (the 5% largest ratings and smallest ratings are removed and what is left is averaged, this reduces the influence of outliers on the mean), a weighted mean (a mean where each value is assigned a specific weight, i.e. the average of 5 and 4 is 4.5, but if the 5 has a weight of 2 and the 4 a weight of 1, then the average is 4.666) with the weights determined by the number of ratings that the users who made the rating had, a weighted mean with weights determine by number of reviews the user has written, and weighted mean with weights determined by number of lists the user has produced. (I chose these because they were the easiest to scrape off of the html code.) For albums, I extacted data from thrash’s Big 4’s best rated albums, Death’s four best albums, and Kendrick’s surprise ep.
1Metallica
Master of Puppets

Mean: 4.438
(# of Ratings: 6832)
Trimmed Mean (5%): 4.508
Weighted Mean (by Ratings) : 4.317
(total # of ratings of users = 2364986, average # ratings per user = 346.163
Weighted Mean (by Reviews): 4.142
(% percent with a review = 20%, Total # of reviews of users = 17611, average # of reviews per user = 2.578)
Weighted Mean (by Lists): 4.243
(% percent with a list = 0.315, Total # of lists of users = 29684, average # of lists per user = 4.345)
2Megadeth
Rust in Peace

Mean: 4.576
(# of Ratings: 6832)
Trimmed Mean (5%): 4.653
Weighted Mean (by Ratings) : 4.482
(total # of ratings of users = 1762067, average # ratings per user = 406.944)
Weighted Mean (by Reviews): 4.48
(% percent with a review = 21.5%, Total # of reviews of users = 13025, average # of reviews per user = 3.008)
Weighted Mean (by Lists): 4.481
(% percent with a list = 34.5%, Total # of lists of users = 24082, average # of lists per user = 5.562)
3Slayer
Reign in Blood

Mean: 4.363
(# of Ratings: 3868)
Trimmed Mean (5%): 4.431
Weighted Mean (by Ratings) : 4.292
(total # of ratings of users = 1741634, average # ratings per user = 450.267)
Weighted Mean (by Reviews): 4.142
(% percent with a review = 22.1%, Total # of reviews of users = 12418, average # of reviews per user = 3.21)
Weighted Mean (by Lists): 4.203
(% percent with a list = 36.1%, Total # of lists of users = 23267, average # of lists per user = 6.015)
4Anthrax
Among the Living

Mean: 4.268
(# of Ratings: 1468)
Trimmed Mean (5%): 4.32
Weighted Mean (by Ratings) : 4.188
(total # of ratings of users = 878260, average # ratings per user = 598.27)
Weighted Mean (by Reviews): 4.12
(% percent with a review = 24.5%, Total # of reviews of users = 6600, average # of reviews per user = 4.496)
Weighted Mean (by Lists): 4.239
(% percent with a list = 39%, Total # of lists of users = 12044, average # of lists per user = 8.204)
5Death
Human

Mean: 4.441
(# of Ratings: 2381)
Trimmed Mean (5%): 4.49
Weighted Mean (by Ratings) : 4.376
(total # of ratings of users = 1331290, average # ratings per user = 559.131)
Weighted Mean (by Reviews): 4.307
(% percent with a review = 24.6%, Total # of reviews of users = 9604, average # of reviews per user = 4.034)
Weighted Mean (by Lists): 4.429
(% percent with a list = 41.4%, Total # of lists of users = 19355, average # of lists per user = 8.129)
6Death
Individual Thought Patterns

Mean: 4.3
(# of Ratings: 1843)
Trimmed Mean (5%): 4.334
Weighted Mean (by Ratings) : 4.234
(total # of ratings of users = 1133352, average # ratings per user = 614.95)
Weighted Mean (by Reviews): 4.25
(% percent with a review = 24.3%, Total # of reviews of users = 7798, average # of reviews per user = 4.231)
Weighted Mean (by Lists): 4.275
(% percent with a list = 41.2%, Total # of lists of users = 15154, average # of lists per user = 8.222)
7Death
Symbolic

Mean: 4.53
(# of Ratings: 2869)
Trimmed Mean (5%): 4.588
Weighted Mean (by Ratings) : 4.448
(total # of ratings of users = 1496182, average # ratings per user = 521.499)
Weighted Mean (by Reviews): 4.382
(% percent with a rating = 24.2%, Total # of reviews of users = 10754, average # of reviews per user = 3.748)
Weighted Mean (by Lists): 4.52
(% percent with a list = 41.5%, Total # of lists of users = 21499, average # of lists per user = 7.494)
8Death
The Sound of Perseverance

Mean: 4.37
(# of Ratings: 2354)
Trimmed Mean (5%): 4.431
Weighted Mean (by Ratings) : 4.282
(total # of ratings of users = 1283893, average # ratings per user = 545.409)
Weighted Mean (by Reviews): 4.261
(% percent with a review = 23.9%, Total # of reviews of users = 8966, average # of reviews per user = 3.809)
Weighted Mean (by Lists): 4.313
(% percent with a list = 39.4%, Total # of lists of users = 17656, average # of lists per user = 7.5)
9Kendrick Lamar
untitled unmastered.

Mean: 3.982
(# of Ratings: 141)
Trimmed Mean (5%): 4.063
Weighted Mean (by Ratings) : 3.874
(total # of ratings of users = 109683, average # ratings per user = 777.894)
Weighted Mean (by Reviews): 3.559
(% percent with a review = 41.8%, Total # of reviews of users = 748, average # of reviews per user = 5.305)
Weighted Mean (by Lists): 3.828
(% percent with a list = 64.5%, Total # of lists of users = 1921, average # of lists per user = 13.624)
10Liturgy
The Ark Work

Mean: 2.926
(# of Ratings: 168)
Trimmed Mean (5%): 2.928
Weighted Mean (by Ratings) : 2.893
(total # of ratings of users = 175645, average # ratings per user = 1045.506)
Weighted Mean (by Reviews): 2.728
(% percent with a review = 31%, Total # of reviews of users = 1014, average # of reviews per user = 6.036)
Weighted Mean (by Lists): 2.955
(% percent with a list = 58.9%, Total # of lists of users = 2000, average # of lists per user = 11.905)
11Portishead
Dummy

Mean: 4.346
(# of Ratings: 1611)
Trimmed Mean (5%): 4.387
Weighted Mean (by Ratings) : 4.321
(total # of ratings of users = 981840, average # ratings per user = 609.46)
Weighted Mean (by Reviews): 4.257
(% percent with a review = 25.3%, Total # of reviews of users = 8195, average # of reviews per user = 5.087)
Weighted Mean (by Lists): 4.317
(% percent with a list = 40.2%, Total # of lists of users = 12964, average # of lists per user = 8.047)
12Aspid
Extravasation

Mean: 4.316
(# of Ratings: 253)
Trimmed Mean (5%): 4.38
Weighted Mean (by Ratings) : 4.325
(total # of ratings of users = 221911, average # ratings per user = 877.119)
Weighted Mean (by Reviews): 4.419
(% percent with a review = 33.6%, Total # of reviews of users = 1956, average # of reviews per user = 7.731)
Weighted Mean (by Lists): 4.439
(% percent with a list = 57.3%, Total # of lists of users = 5092, average # of lists per user = 20.126)
13Metallica
Kill 'Em All

Mean: 3.973
(# of Ratings: 4867)
Trimmed Mean (5%): 4.009
Weighted Mean (by Ratings) : 3.887
(total # of ratings of users = 1920326, average # ratings per user = 394.561)
Weighted Mean (by Reviews): 3.753
(% percent with a review = 20.2%, Total # of reviews of users = 13829, average # of reviews per user = 2.841)
Weighted Mean (by Lists): 3.877
(% percent with a list = 32%, Total # of lists of users = 25546, average # of lists per user = 5.249)
14Lou Reed and Metallica
Lulu

Mean: 1.415
(# of Ratings: 1043)
Trimmed Mean (5%): 1.275
Weighted Mean (by Ratings) : 1.443
(total # of ratings of users = 724136, average # ratings per user = 694.282)
Weighted Mean (by Reviews): 1.425
(% percent with a review = 32.3%, Total # of reviews of users = 6994, average # of reviews per user = 6.706)
Weighted Mean (by Lists): 1.394
(% percent with a list = 50.4%, Total # of lists of users = 12615, average # of lists per user = 12.095)
15Pink Floyd
The Dark Side of the Moon

Mean: 4.574
(# of Ratings: 6187)
Trimmed Mean (5%): 4.644
Weighted Mean (by Ratings) : 4.493
(total # of ratings of users = 2283270, average # ratings per user = 369.043)
Weighted Mean (by Reviews): 4.392
(% percent with a review = 20.8%, Total # of reviews of users = 17284, average # of reviews per user = 2.794)
Weighted Mean (by Lists): 4.488
(% percent with a list = 33.9%, Total # of lists of users = 30206, average # of lists per user = 4.882)
16Opeth
Blackwater Park

Mean: 4.477
(# of Ratings: 5047)
Trimmed Mean (5%): 4.548
Weighted Mean (by Ratings) : 4.377
(total # of ratings of users = 1998217, average # ratings per user = 395.922)
Weighted Mean (by Reviews): 4.219
(% percent with a review = 22.5%, Total # of reviews of users = 16347, average # of reviews per user = 3.239)
Weighted Mean (by Lists): 4.272
(% percent with a list = 36.3%, Total # of lists of users = 28805, average # of lists per user = 5.707)
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