Hi there, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.
The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!
We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?
Below you'll find details around some of the important factors that went into calculating the ranking score for Mount / Mt John Observatory.
If you have any questions or comments about our ranking score calculation please get in touch at email@example.com. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.
44 Valid Reviews
The Mount / Mt John Observatory experience has a total of 44 valid reviews. There are no invalid reviews that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.
Below is the distribution of ratings for the 44 valid reviews:
The raw data average (mean) for all the Mount / Mt John Observatory valid reviews is 78.41% and is based on 44 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.
24 Face-to-Face Reviews
The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.
Within the 44 valid reviews, the experience has 24 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 24 face-to-face reviews:
The raw data average (mean) for all the Mount / Mt John Observatory face-to-face reviews is 89.17% and is based on 24 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.
Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.
Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.
Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.
|Carl von Horstig||10/10||615 days||49.81||100%|
|Petr Jesko||8/10||941 days||10.51||20%|
|Michelle Ouellette||1/10||1118 days||4.22||7%|
|wayne jeskie||1/10||1179 days||4.15||7%|
|Maarten Simons||8/10||1190 days||5.84||10%|
|Timea Bagosi||3/10||1210 days||4.41||7%|
|Denise Ewbank||8/10||1957 days||4.58||7%|
|kellie francis||2/10||2032 days||3.27||5%|
|Tim J||2/10||2032 days||3.27||5%|
|Clay Rush||2/10||2307 days||2.94||4%|
|Craig Jones||9/10||2397 days||3.22||5%|
|Jaap & Susanne||9/10||2681 days||3.39||5%|
|Melanie Mathiak||10/10||2684 days||3.39||5%|
|Nick Taylor||10/10||3006 days||2.86||4%|
|Kevin Morris||9/10||3010 days||2.85||4%|
|Margit and Corein Groenevelt||7/10||3024 days||2.83||4%|
|Dave Patterson||9/10||3029 days||2.82||4%|
|Andy Johnson||9/10||3029 days||2.82||4%|
|Natthien Le Gall||8/10||3039 days||2.8||4%|
|Robert Smith||9/10||3057 days||2.77||4%|
|Sue Haward||10/10||3061 days||2.77||4%|
|Andrew Hammond||9/10||3189 days||2.13||2%|
|Julie Seakins||10/10||3493 days||1.72||2%|
|Stefanie E||6/10||3500 days||2.05||2%|
|Dave Ashun||10/10||3744 days||1.65||1%|
|Mark Coffey||10/10||3858 days||1.22||1%|
|Georgina Mulligan||10/10||4056 days||0.94||0%|
Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.
A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The Mount / Mt John Observatory experience has plenty of reviews and does not meet the criteria for any adjustment.
There may be an adjustment if an experience hasn't received any reviews within the last 60 days. However the Mount / Mt John Observatory experience does not meet the criteria for any adjustment.
In addition, an experience's ranking score may be adjusted for each day there is no new ranking. After 1 day the adjustment comes into effect. The maximum number of days that can be adjusted for is 364 days.
The Mount / Mt John Observatory experience has been adjusted for 364 days. Adjustments are according to the following table.
The final ranking score once adjustments and rounding has been applied. This value is cached and recalculated each day. Therefore it may not be precisely accurate based on the other values presented.
If you have any questions or comments about our ranking score calculation please get in touch at firstname.lastname@example.org.