Darker than Black - Kuro no Keiyakusha
Rating Average: 3.8000Rating Stddev: 0.39999999999999997
Review Count: 5
Existing Best Bet #: 4.4
( $rating_average - $rating_stddev ) + ( log($reviews) / log(5) )
( 3.8000 - 0.39999999999999997 ) + ( 1.6094379124341 / 1.6094379124341 )
( 3.4 ) - 1
Proposed Best Bet #:
( ( $rating_average - ( $rating_stddev / 2) ) - ( ( $stddev==0 and $reviews<5)? .5: 0 ) * $similarity
( ( 3.8000 - 0.2 ) - 0 ) * $similarity
( 3.6 - 0 ) * $similarity
3.6 * $similarity
In English: Average rating minus half the standard deviation of the ratings, with a penalty of half a rating point if there are fewer then five reviews with no variation in their ratings.
Discussion: This uses the average rating as the base, lowering the overall rating based on the amount of variance in the ratings. Additionally it lowers the rating if only a few people have rated it and they've all given it the same score. Perhaps shows with few ratings shouldn't even show up in best bets.
Keywords: 8 - 2007, TV, Fantasy, Action, Adventure, Violent, Drama, Supernatural
For reference, Devil Doll's similarity calc is this:
( $matching_keys * ( $matching_keys / $total_keys ) * $total_keys ) / ( $total_keys * $total_keys )
| Title | Key Match | Rating | Rating - stddev | Devil Doll's Similarity Calc | New bbet | New bbet * Similarity | Old bbet | Old bbet * Similarity |
|---|---|---|---|---|---|---|---|---|
| Kiba | 8 | 3.50 | 3.25 | 100% | 3.25 | 3.25 | 3.43 | 3.43 |
| Naruto Shippuuden (TV) | 7 | 4.00 | 4.00 | 76% | 3.50 | 2.68 | 4.00 | 3.06 |
| Tears to Tiara | 7 | 3.25 | 3.03 | 76% | 3.03 | 2.32 | 3.68 | 2.82 |
| Bleach | 7 | 3.43 | 2.90 | 76% | 2.90 | 2.22 | 3.59 | 2.75 |
| Kaze no Stigma | 7 | 3.17 | 2.72 | 76% | 2.72 | 2.08 | 3.38 | 2.59 |
| The Sacred Blacksmith | 7 | 3.00 | 2.65 | 76% | 2.65 | 2.03 | 3.15 | 2.41 |
| Interlude | 6 | 3.75 | 3.53 | 56% | 3.53 | 1.99 | 4.18 | 2.35 |
| D.Gray-man | 7 | 3.00 | 2.59 | 76% | 2.59 | 1.98 | 2.87 | 2.19 |
| Needless | 7 | 3.00 | 2.50 | 76% | 2.50 | 1.91 | 2.86 | 2.19 |
| Claymore | 7 | 3.00 | 3.00 | 76% | 2.50 | 1.91 | 3.68 | 2.82 |
| Naruto | 6 | 3.62 | 3.20 | 56% | 3.20 | 1.80 | 4.87 | 2.74 |
| To Aru Kagaku no Railgun | 6 | 3.33 | 3.10 | 56% | 3.10 | 1.74 | 3.98 | 2.24 |
| sola | 6 | 3.40 | 3.00 | 56% | 3.00 | 1.69 | 3.60 | 2.02 |
| Omamori Himari | 6 | 3.00 | 2.65 | 56% | 2.65 | 1.49 | 3.15 | 1.77 |
| Juuni Kokuki | 5 | 3.90 | 3.75 | 39% | 3.75 | 1.46 | 5.03 | 1.97 |
| Ichiban Ushiro no Daimaou | 6 | 3.00 | 2.59 | 56% | 2.59 | 1.46 | 3.30 | 1.85 |
| Chrono Crusade | 5 | 3.89 | 3.73 | 39% | 3.73 | 1.46 | 4.94 | 1.93 |
| High School of the Dead | 6 | 3.00 | 2.55 | 56% | 2.55 | 1.44 | 3.11 | 1.75 |
| Zero no Tsukaima: Futatsuki no Kishi | 6 | 2.86 | 2.54 | 56% | 2.54 | 1.43 | 3.43 | 1.93 |
| Shingeki no Kyojin | 6 | 3.00 | 3.00 | 56% | 2.50 | 1.41 | 3.43 | 1.93 |
| Chainsaw Man | 6 | 3.00 | 3.00 | 56% | 2.50 | 1.41 | 3.43 | 1.93 |
| Witchblade | 6 | 3.00 | 2.50 | 56% | 2.50 | 1.41 | 2.43 | 1.37 |
| Tokyo Ghoul √A | 6 | 3.00 | 3.00 | 56% | 2.50 | 1.41 | 3.00 | 1.69 |
| Angel Beats! | 6 | 2.91 | 2.46 | 56% | 2.46 | 1.38 | 3.50 | 1.97 |
| Rozen Maiden | 5 | 3.75 | 3.53 | 39% | 3.53 | 1.38 | 4.61 | 1.80 |
| Mahou Shoujo Lyrical Nanoha A's | 5 | 3.75 | 3.53 | 39% | 3.53 | 1.38 | 4.18 | 1.63 |
| Durarara!! | 5 | 3.75 | 3.53 | 39% | 3.53 | 1.38 | 4.18 | 1.63 |
| Mahou Shoujo Lyrical Nanoha | 5 | 3.75 | 3.53 | 39% | 3.53 | 1.38 | 4.18 | 1.63 |
| Kurokami The Animation | 6 | 2.67 | 2.43 | 56% | 2.43 | 1.37 | 2.88 | 1.62 |
| Death Note | 5 | 4.00 | 4.00 | 39% | 3.50 | 1.37 | 4.86 | 1.90 |
| Majin Tantei Nougami Neuro | 5 | 4.00 | 4.00 | 39% | 3.50 | 1.37 | 4.00 | 1.56 |
| Fate/Stay Night: Heaven's Feel | 5 | 4.00 | 4.00 | 39% | 3.50 | 1.37 | 4.00 | 1.56 |
| Jigoku Shoujo Futakomori | 5 | 4.00 | 4.00 | 39% | 3.50 | 1.37 | 4.68 | 1.83 |
| Saiunkoku Monogatari 2nd Series | 5 | 4.00 | 4.00 | 39% | 3.50 | 1.37 | 4.43 | 1.73 |
| Kizumonogatari | 5 | 4.00 | 4.00 | 39% | 3.50 | 1.37 | 4.00 | 1.56 |
| Noragami Aragoto | 5 | 4.00 | 4.00 | 39% | 3.50 | 1.37 | 4.00 | 1.56 |
| Shining Tears x Wind | 5 | 4.00 | 4.00 | 39% | 3.50 | 1.37 | 4.00 | 1.56 |
| Hakkenden: Touhou Hakken Ibun | 5 | 4.00 | 4.00 | 39% | 3.50 | 1.37 | 4.00 | 1.56 |
| Nejimaki Seirei Senki: Tenkyou no Alderamin | 5 | 4.00 | 4.00 | 39% | 3.50 | 1.37 | 4.00 | 1.56 |
| Vinland Saga Season 2 | 5 | 4.00 | 4.00 | 39% | 3.50 | 1.37 | 4.00 | 1.56 |
| Shakugan no Shana II | 5 | 4.00 | 4.00 | 39% | 3.50 | 1.37 | 4.43 | 1.73 |
| Avatar: The Last Airbender - Season 3 | 5 | 4.00 | 4.00 | 39% | 3.50 | 1.37 | 4.68 | 1.83 |
| X (TV) | 5 | 3.75 | 3.47 | 39% | 3.47 | 1.36 | 4.91 | 1.92 |
| Karas | 5 | 3.67 | 3.43 | 39% | 3.43 | 1.34 | 3.88 | 1.51 |
| Senkaiden Houshin Engi | 5 | 3.67 | 3.43 | 39% | 3.43 | 1.34 | 3.88 | 1.51 |
| Zombie-Loan | 5 | 3.67 | 3.43 | 39% | 3.43 | 1.34 | 3.88 | 1.51 |
| Tokyo Majin Gakuen Kenpuchou: Tou | 6 | 2.75 | 2.34 | 56% | 2.34 | 1.31 | 2.78 | 1.56 |
| Mahou Shoujo Lyrical Nanoha StrikerS | 6 | 2.75 | 2.34 | 56% | 2.34 | 1.31 | 2.78 | 1.56 |
| Kappa no Coo to Natsuyasumi | 5 | 3.50 | 3.25 | 39% | 3.25 | 1.27 | 3.43 | 1.34 |
| Loveless (TV) | 5 | 3.50 | 3.25 | 39% | 3.25 | 1.27 | 3.43 | 1.34 |
