# Questions tagged [statistics]

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### A/B testing - client wanted the test run 70/30

We recently ran an A/B test for a new sidebar in a checkout flow. New variant 70% of traffic, old 30% of traffic. We tried to get client to run at 50/50 but they were sure our version was an ...
• 141
1 vote
116 views

### How can i interpret the observed difference in a/b test?

I conducted an a/b test but I was confused about how to interpret the result. I got 0.5% difference between control and treatment groups and statistical significance for the difference (p <0.05). ...
49 views

### Statistical breakdown of use of naked vs www and http vs https when users type URLs?

When users type URLs into the browser (i.e. in order to visit a web page), of the 6 possible permutations, what is the percent of the time that each permutation is entered? example.com http://example....
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183 views

### What percent of the web's images have alt text?

Web developers are strongly encouraged to add alt text (via the <img> tag's alt="text here" attribute) when adding images to webpages. Here's an example of alt text providing a ...
• 289
734 views

### Stats on percentage of desktop and laptop computers with high resolution monitors

Mobile phones and tablets nowadays all come with high-resolution (pixel density) screens. New Apple computers come with at least 218 pixels/inch. – Does anyone know the percentage of desktop and ...
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50 views

### How much does bounce rate vary according to page load speed?

When a user loads a page by clicking on a link or image they may stay and read the content or they may "bounce" (leave). Presuming fewer people stick around the longer the page takes to load,...
• 289
94 views

### Any best practice on how to represent player progress stat in a game?

I'm making a musical game where user should recognize notes and get faster at note reading. I'm in the designing process and I get quite stuck on the designing of the player progress on the level ...
62 views

### What percentage of average users know about Find (ctrl or cmd + f), and Find and Replace, native to applications? [duplicate]

I'm having trouble finding recent data on what percentage of average users use, or even know about, the Find feature native to most applications. I recently found a mention of a white collar worker ...
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2k views

### Are there stats about height of browser windows worldwide / by industry?

I wonder because I'm working on the design of trade platform and found that a lot of moments need improvements due to the different viewports on different devices and so on. The platform does not need ...
• 21
1 vote
108 views

### How to display data with variation to unsophisticated users?

In my application, students are grouped into classes and each student has a performance metric. I want to be able to show teachers and principals a list of classes, along with an aggregate performance ...
• 561
148 views

### Statistics (or tools) on screen calibration & readability

Fairly straight forward question, but I could not find any answers to it. Are there any known statistics regarding screen calibration & readability? Are there any colors to avoid where screen ...
• 1,074
4k views

### How many test participants to 'prove' an issue?

Its often said that 5-10 usability testing participants is what you should aim for to identify the bulk of issues in a system. There's loads of research behind this. This is the right way to do ...
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187 views

### How do I treat an 'Incomplete' in a Usability study?

I conducted a usability test where a user is given a set of tasks and we score them based on task completion (completed with ease, completed with minor difficulty, completed with major difficulty, and ...
147 views

### A/B testing - how to deal with minority that chose B?

Publishers can test different site layouts and various versions of their content (for example, testing more than one headline on an article) This can be done with A/B testing. For example, you might ...
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90 views

### Confidence intervals, Confidence levels and probability of simple tests

It seems to be a simple problem, but i cant figure it out Lets say, I would like to know if there is some point to implement new feature. If we have to focus on the feature or not. Lets assume there ...
• 141
1 vote
68 views

### What is the best way to statistically analyze a score system and number of steps for users?

I'm trying to analyze two measurements, the number of steps it takes the user to complete a task on a website, and a ranking rubric of 1 - 3 (1 is simple and 3 is considered difficult) for each step ...
• 11
1 vote
43 views

### Presenting selling statistics for multiple tags per each sold item in mobile application

I am writing application mobile (React native) application that lists items that users buy and sell. Each item can be tagged with some tags. I want to present some statistics statistics like: profit ...
• 111
123 views

### Graphs comparison placement

I'm exploring ways to demonstrate graphs in comparison. More specifically a web tool I've been working on needs to visualise a "Control Group" and an "Experimental Group" in a parallel way. One ...
1 vote
92 views

### What to do when sample size is too small during usability study?

If the sample was just a bit too small to achieve statistical significance in a remote usability study(confidence intervals too wide due to more variability than expected) Is it acceptable to just ...
2k views

### What percentage of internet users save credentials in the browser?

I'm trying to get a high-level understanding of what percentage of internet users allow their browser to store the username/password so I can understand the potential impact "breaking" this will have ...
• 181
1 vote
90 views

### Should I invite existing users to my summative usability test?

I'm about to do a summative usability test on an app with a bunch of participants. I am convinced that I should mostly invite people unfamiliar with the app to see how well they are doing when ...
• 113
1 vote
113 views

### Best way to approach statistics pages

In general what is the best way to approach a statistics page. Not a dashboard, but a page showing a number of numerical stats with labels. Say for example, there are around 10 numerical stats that we ...
215 views

### What's the best way to interpret Likert Scales with equal negative and positive Likert Items?

What's the best way to interpret Likert Scales with equal negative and positive Likert Items that represent each construct presented? Construct: Accuracy of Data Scale: Agree-Disagree (1 to 5) The ...
152 views

### How do you know, when a closed card sorting is valid (for website navigation)?

I wonder if there is a way to tell, when the results of a closed card sorting test are statistically significant (e.g.: number of participants or a formular). Background: I am working for a content ...
166 views

### Some stats about social networks used by iOS/Android users?

Are there some info and statistics about the social networks used by iOS / Androis users? If my app will be present in App Store and Google Play, I'd like to distinguish the login methods, the social ...
• 212
1 vote
376 views

### Is it worth spending time to design a tablet-friendly site in 2016?

Are tablets dying? Global tablet market is declining and we are getting less than 5% of traffic from tablets.
41 views

### Should I have different toggles for collecting usage data and crash reports?

I am developing a mobile app and I am currently working on the usage and crash report functionalities, which made me start wondering: should I ask the user two different permissions for these features,...
• 123
1 vote
236 views

### What tools are available to collect statistics on user behavioral patterns?

I have an application with a relatively large user base. I would like to collect statistics on user behavior, analyze patterns etc. I expect that statistics to answer questions like: How many female ...
• 1,175
891 views

### Statistics and Usability [closed]

I have an engineering background and I work as an interaction designer at a website company. I started to work 3 months ago. I am new in this field. To interpret analytics data and usability tests, ...
• 31
678 views

### What would be a good way to visualize recent win/loss (player form) data?

I have data like this which represents the recent form (win/loss record) of a player: ★★★☆★★☆★☆☆★★★★★★ Now, I want to visualize this data. What would be a good way to do so? The purpose is to ...
• 123
184 views

### What is the purpose behind numerical ratings; e.g. 4/5 stars

Haven given a lot of thought as to which site would be the best fit for this question, I decided it was ultimately a user experience one. Feel free to suggest a better site if you think it would fit ...
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2k views

### How to calculate user interface's efficiency time

I'm making a user study. Users had to perform the same task 10 times. I've recorded the completion times of each task. How could I calculate the UI's efficiency based on this data? Does anyone know ...
• 307
2k views

### Anyone have statistics on allowing geolocation?

We're trying to work out how many people are likely to allow our website to access their location, so they don't have to enter a postcode/zipcode. We're debating automatically asking them versus ...
2k views

### What percent of non-English-native people use English system language on their phone?

tl;dr: "What proportion of Spanish (or some other non-English native) people use English as their phone language?" I am writing an Android app. I plan to publish it primarily in a specific country. ...
• 131
184 views

### How to ask a user which factors are most important to them when calculating weights in a model?

I'm creating an index related to "walkability". By walkability I mean: Length of sidewalk available User perception rating on various measures of performance Many other factors Some users may not ...
4k views

### How to determine the oldest browser version to support before you have users

I'm working on a brand new website and trying to figure out how to decide the oldest version of IE to support since I have absolutely no user information to look at. Most of the answers I come across ...
• 1,213
1 vote
169 views

### Displaying statistics: Use spider graphs? [closed]

Is a spider graph or progress bars better to display a set of statistics/attributes? E.g. pace, shooting accuracy, dribbling for a football player.
46k views

### Are there devices narrower than 320px (and data on their usage for web browsing)?

Most organisations I know of when testing responsive designs (and responders to the question What is the smallest screen size you design for) use 320px as the narrowest device width they test for, ...
4k views

### Does adding a click count next to a hyperlink enhance the user experience?

What is the main purpose behind Discourse's link click count?
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159 views

### Are there any statistics or research on location approval by users on mobile and desktop browsers?

I'm looking for statistics or research about users that permit browsers to use their location, drilled down to the type of browser, platform, vs. native apps, etc. Also, general recommendations about ...
90 views

### Editing functionalities in a voting system

In the current design, the voting system allows users to CRUD votes. What concerns me now is the editing part. Suppose a user created a new topic with 4 choices. All votes casted by different users ...
• 123
542 views

### Where can i find "numbers" about bounce rate statistics in mobile application?

I am about to offer my boss two user registration funnels. One that the user must validate their phone number before they can use the app (something my boss prefer) and the other let the user use the ...
631 views

### App Usage Statistics - WHAT do you gather?

I am considering adding "gather anonymous usage statistics", and was looking around for suggestions and experiences. I was a bit surprised that I could find a lot of how, but only little discussion ...
• 7,638
125 views

### How to improve Sales Statistics?

Staffs can see Sales Statistics on their dashboard which allow them to see number of sales made per day. This is a weekly Statistic. For example, on Tuesday Paul have 4 sales which has been "...
• 240
16k views

### Percentage of screen readers users in USA?

"Percentage of screen readers users in USA" : Is there a place where I can find such statistics ? A more global statistic that would still be good too. I came across this page but I could not find ...
• 359
1k views

### Usability issue when resizing browser window on responsive website

As I was discussing about the benefits of using responsive web design (RWD) nowadays, my manager said that one of his biggest gripe is the fact that horizontally resizing the browser window often ...
• 1,074
676 views

### Percentage of users who edit the URL of the site they're on?

The company I work for rents out vacation properties, with an alphanumeric ID for each property. Such as http://www.example-domain.tld/abc123456 There are SEO recommendations for using a slug / ...
• 193
1 vote
682 views

### Why show usage numbers on the website?

Many websites show their usage statistics. For example, this website on the bottom of the page shows the number of people that are using the website at the moment, and how many updates were made. It's ...
1 vote
590 views

### Best Way to Illustrate Creating Charts based on Dynamic Data

I'm developing a application that allows business users to create forms with fields such as text, select boxes, check boxes, radio buttons, numeric, etc with a easy drag-n-drop UI like: Once the form ...
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