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 Norwest Adventures.

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

Norwest Adventures

Valid Reviews

33 Valid Reviews

The Norwest Adventures experience has a total of 34 reviews. There are 33 valid reviews that are included when calculating the ranking score and 1 invalid review 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 33 valid reviews:

Rating Count Percentage
10/10 20
61%
9/10 6
18%
8/10 1
3%
7/10 4
12%
6/10 1
3%
5/10 0
0%
4/10 1
3%
3/10 0
0%
2/10 0
0%
1/10 0
0%

90.91% Average

The raw data average (mean) for all the Norwest Adventures valid reviews is 90.91% and is based on 33 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

19 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 33 valid reviews, the experience has 19 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 19 face-to-face reviews:

Rating Count Percentage
10/10 11
58%
9/10 4
21%
8/10 1
5%
7/10 2
11%
6/10 0
0%
5/10 0
0%
4/10 1
5%
3/10 0
0%
2/10 0
0%
1/10 0
0%

90.53% Average

The raw data average (mean) for all the Norwest Adventures face-to-face reviews is 90.53% and is based on 19 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

94.50%

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
S H 10/10 322 days 83.57 100%
Mietta Feery 9/10 543 days 53.28 63%
Michelle Dalgliesh 10/10 717 days 27.64 32%
Karin Karlsson 10/10 889 days true 14.07 15%
Katharina Block 8/10 1257 days true 5.73 5%
Annika Fletemeyer 9/10 1257 days true 5.73 5%
techno69 10/10 1418 days 4.56 4%
Yiying Zhang 10/10 1479 days 4.47 4%
Markus Eckert 10/10 1628 days true 5.12 4%
Philip Schumann 10/10 1628 days true 5.12 4%
Jason MacLeod 7/10 1660 days 4.23 3%
Kim 10/10 1966 days 3.81 3%
Ingeborg Ruysscher 10/10 2056 days 3.68 3%
Lydia Holleman 10/10 2078 days true 4.38 4%
Stephanie Levepue 9/10 2091 days true 4.36 3%
Loesje 7/10 2178 days 3.52 2%
Sethkins 10/10 2362 days 3.26 2%
Stephanie Wirthlin 4/10 2385 days true 3.65 3%
hands 6/10 2422 days 3.18 2%
Gunter 10/10 2711 days true 3.34 2%
Seonaid 10/10 2728 days 2.76 2%
Suz 10/10 2818 days 2.64 1%
Anna 10/10 3011 days true 2.85 2%
Jeannot Robert 10/10 3131 days true 2.65 1%
rosil 7/10 3427 days true 2.17 1%
Martina Bumiller 10/10 3432 days true 2.16 1%
Stefanie 7/10 3452 days true 2.13 1%
Nikki Annand 9/10 3547 days 1.64 0%
Linda and Peter 9/10 3806 days true 1.54 0%
Klaus Uhl 10/10 3810 days true 1.54 0%
Fung 10/10 3819 days true 1.52 0%
Charles Price 10/10 3831 days true 1.5 0%
Sue 9/10 3831 days true 1.5 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 Norwest Adventures experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-5.94% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 days. However the Norwest Adventures 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 Norwest Adventures experience has been adjusted for 297 days. Adjustments are according to the following table.

Days Adjustment
294 -5.88%
295 -5.90%
296 -5.92%
297 -5.94%
298 -5.96%
299 -5.98%
300 -6.00%

Final Ranking Score

89%

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.