Item | Value | Description |
---|---|---|

Total number of votes | 3 | This value will be seen by users in the problem page. |

Average value | 3 | This value will be seen by users in the problem page. |

Score (lower bound) | 1.5013258119938 | This value will be used to order problems in highest rated list. |

Score (upper bound) | 4.4986741880062 | (not used) |

The score is calculated by Wilson score confidence interval (http://www.evanmiller.org/how-not-to-sort-by-average-rating.html) with 95% of confidence:

.

where x-bar is ((the average number of stars) - 1) / 4, and the final score is 1 + 4 * (the result of the formula).

The old formula was used until Apr 30, 2012. Thanks to Margus for the correction and logical explanation!