Ranking Score Explained

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 info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.

Nick Morrison's avatar

Nick Morrison

Rankers owner

Mount / Mt John Observatory

Valid Reviews

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:

Rating Count Percentage
10/10 16
36%
9/10 11
25%
8/10 6
14%
7/10 2
5%
6/10 2
5%
5/10 0
0%
4/10 0
0%
3/10 1
2%
2/10 3
7%
1/10 3
7%

78.41% Average

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.

Face-to-Face Reviews

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.

More about face-to-face reviews

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:

Rating Count Percentage
10/10 10
42%
9/10 7
29%
8/10 4
17%
7/10 1
4%
6/10 2
8%
5/10 0
0%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

89.17% Average

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.

Weighted Average

78.09%

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.

Reviewer Rating Age Face-to-Face Weight Relative Weight
Carl von Horstig 10/10 700 days true 29.72 100%
Petr Jesko 8/10 1026 days true 5.47 18%
Michelle Ouellette 1/10 1203 days 3.51 12%
wayne jeskie 1/10 1264 days 3.44 12%
Maarten Simons 8/10 1275 days true 4.46 15%
Michelle 6/10 1280 days true 3.89 13%
Stan 10/10 1292 days true 4.66 16%
Timea Bagosi 3/10 1295 days 3.59 12%
Denise Ewbank 8/10 2042 days true 3.21 11%
kellie francis 2/10 2117 days 2.44 8%
Tim J 2/10 2117 days 2.44 8%
Clay Rush 2/10 2392 days 2.08 7%
Craig Jones 9/10 2482 days 2.63 9%
Jaap & Susanne 9/10 2766 days true 2.14 7%
Melanie Mathiak 10/10 2769 days true 2.13 7%
scottee 1/10 3062 days 1.19 4%
Nick Taylor 10/10 3091 days true 1.58 5%
Jon_and_Family 9/10 3092 days 1.58 5%
Kevin Morris 9/10 3095 days true 1.58 5%
Margit and Corein Groenevelt 7/10 3109 days true 1.41 5%
Dave Patterson 9/10 3114 days true 1.54 5%
Andy Johnson 9/10 3114 days true 1.54 5%
LandJ 7/10 3123 days 1.39 5%
Christiane 8/10 3123 days 1.45 5%
Natthien Le Gall 8/10 3124 days true 1.45 5%
Edwards 9/10 3130 days true 1.52 5%
Robert Smith 9/10 3142 days true 1.49 5%
Sue Haward 10/10 3146 days true 1.49 5%
Amanda 10/10 3182 days 1.43 5%
Andrew Hammond 9/10 3274 days 1.27 4%
confectioneer 9/10 3457 days 0.96 3%
pemo 10/10 3457 days 0.96 3%
johnandgin 10/10 3488 days true 0.9 3%
Horst 9/10 3491 days true 0.9 3%
Loleit 10/10 3509 days true 0.87 3%
Julie Seakins 10/10 3578 days 0.75 3%
Stefanie E 6/10 3585 days true 0.61 2%
eowyn2k 8/10 3608 days 0.66 2%
Dave Ashun 10/10 3829 days true 0.32 1%
hamish73 10/10 3849 days 0.28 1%
Dan 10/10 3895 days true 0.21 1%
Sally 10/10 3895 days true 0.21 1%
Mark Coffey 10/10 3943 days 0.12 0%
Georgina Mulligan 10/10 4141 days 0.0 0%

Adjustments

Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.

Sample Size Adjustment

No Adjustment

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.

Recent Reviews Adjustment

-3.98% 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 199 days.

The Mount / Mt John Observatory experience has been adjusted for 199 days. Adjustments are according to the following table.

Days Adjustment
196 -3.92%
197 -3.94%
198 -3.96%
199 -3.98%
200 -4.00%
201 -4.02%
202 -4.04%

Final Ranking Score

74%

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 info@rankers.co.nz.