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Questions tagged [ab-test]

A/B testing, also known as split or bucket testing, is a controlled comparison of the effectiveness of variants of a website, email, or other commercial product.

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Which statistical approach is best for diverse conversion rates in a controlled experiment?

Our software startup builds chat bots for ecommerce websites. The chatbot talks to customers that open the chat bot, and has the goal of closing the sale with the store’s main product. We have about ...
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Am I suppose to do any statistical test on results?

I am doing an email campaign. Before sending emails to users I divided my user base into treatment and control groups (50-50). Divided the groups in such a way that no difference in user behaviour. I ...
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Usefulness of a/b test if we already know we must implement the feature

The situation is as follows. Because of compliance reasons, we must implement a change to our registration flow. Party A says: We must run an a/b test so that we understand the effect of that change. ...
minitauros's user avatar
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AB testing: Control was performing 0.5% better than experiment set before the initiation of experiment

So we introduced a new feature in our app, that would aid conversion (hypothetically). When i tried to measure this incremental change in conversion, i split my base set of customers into control(C) ...
Narahari B M's user avatar
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Setting up test audience for a/b testing

I am trying to design a test for our marketing team. Right now they run a lot of experiments focussed on gamification and points. Let's assume a hypothetical situation for spotify Experiment Set Up ...
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1 answer
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Evaluate a Recommender System based on the data between two months

currently my company's planning to use a new Recommender tool/library for a book website, and now we want to compare the result between these two tools (both of the tool use Universal Recommender ...
Quang Hoàng Minh's user avatar
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1 answer
29 views

Why NHST based A/B testing is not allowed to continuously monitor?

I am reading a paper regarding A/B test continuous monitoring. https://alexdeng.github.io/public/files/continuousMonitoring.pdf In the abstract part, it states A crucial problem of Null Hypothesis ...
fuyi's user avatar
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2 answers
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How to check the impact of predictive Model

Suppose that I build an email marketing campaign where the goal is to predict which members will make purchases or not and based on that change the marketing email campaigns. After we build the model, ...
Ramin Salimi's user avatar
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Can I use multi armed bandits to optimize how much both algorithms are weighted when creating a composite score?

So, I'm aware that multi-armed bandits are great for evaluating multiple models and from what I understand, it is mainly used to pick a specific model. I would still like to evaluate two models but I ...
madst's user avatar
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1 answer
51 views

A/B test on model - split on results

I developed a predictive model that assigns the best product (P1, P2, P3) for each customer. I wanted to compare the conversion rate using this model VS the as-is deterministic assignment, so I ...
Matteo Felici's user avatar
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39 views

Causal Inference where the treatment assignment is randomized [closed]

I have mostly worked with Observational data where the treatment assignment was not randomized. In the past, I have used PSM, IPTW to balance and then calculate ATE. My problem is: Now I am working on ...
manish Prasad's user avatar
2 votes
1 answer
1k views

AB testing split algorithm

I want to understand what is the most effective algorithm for splitting. I have ids of users and I want to split them into 2 groups. Now I have 2 variants: Modulo approach - let's say we will place ...
AO1992's user avatar
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Multivariate testing

I'm going to run a test with 4 different variants (3 variants and a control group), and we want to find the variant with the highest conversion. Are there any resources/methods in R/python to: ...
David Masip's user avatar
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How do I conduct an experiment on the new pricing if it's impossible to conduct an A/B test?

We want to introduce a new price list for the customers of our international SaaS company. Beforehand we want to test this new price list in several countries. A/B test cannot be conducted here ...
Никита Юсупов's user avatar
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0 answers
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Practical constraints in A/B testing

I saw an article about an A/B test that google had performed way back. They wanted to decide what shade of blue a button should be and how that affects click-through rate. They divided users randomly ...
user9343456's user avatar
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What is the right approach to bucket users for algorithms with different coverage for A/B testing

I've couple of recommendation algorithms that I want to A/B test. Algorithm A has 90% user coverage and algorithm B has 95% user coverage. That means if the algorithms are asked to provide ...
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3 answers
1k views

A/B Testing (Binomial Distribution vs Random Distribution)

When performing an A/B test for the number of clicks for users viewing (each view is an impression) two variants of an ad, a binomial distribution can be assumed where each variant has a constant ...
DD.'s user avatar
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1 answer
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A/B test results contradictory with offline machine learning model performance

This seems to be a common problem when bringing machine learning models to production. Let's say we have an optimized machine learning model which gives decent performance metric in the unseen testing ...
CathyQian's user avatar
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1 answer
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Time duration for ML models A/B testing

I am going to perform A/B tests for ML models. However I am not sure how long should I run it online in order to see significant differnce. What would be the right time frame ? and what will be the ...
itsMe's user avatar
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1 answer
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Recommend System AB test metric events

I build personal recomendation system for choosing games. In website on main page on special place there is collection of personal games recomendation. And after AB test(between 2 recommend system) I ...
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Data science Product Question Help [closed]

I was recently asked this in a ds interview pertaining to product thinking - If a product feature is being rolled out, but an a/b test is unable to be performed due to whatever reason, how can we ...
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Imbalanced classification or Regression? What is the best approach to my A/B testing related problem?

The context of the problem is A/B testing of two new versions of a game. I have a structured dataset (50000 rows x 22 columns) from the game designers that represents data with respect to two versions ...
Pradical2190's user avatar
2 votes
1 answer
149 views

Permutation test on two groups

I am trying to use a permutation test to test my hypothesis. I want to make sure I am understanding concept of permutation correctly. I have control and experimental group. Then I combine them and ...
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1 answer
290 views

Treatment and Control selection in A/B Testing

I'm hoping to get a better understanding of A/B Testing design. In particular, I'm interested in understanding how treatment and control units are selected. I read that these 2 groups are selected ...
Egodym's user avatar
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232 views

Firebase AB testing algorithm

We have run an AB test at firebase which has the following results: I was also building my own Bayesian AB-test suite and was wondering how they came to these conclusions. What I was doing was ...
Boris Mulder's user avatar
1 vote
1 answer
217 views

No statistical significance but observable trends

I have a general inference question regarding scenarios when results from data are not statistically significant but there appears to be an observable trend. For example, ...
connor449's user avatar
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1 vote
2 answers
48 views

Fitting a model as a significance testing alternative

My colleagues use somewhat unusual approach to estimate how far away performance of some of our company related processes diverge from historical levels. Their nature isn't really relevant for the ...
singleton's user avatar
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2 votes
1 answer
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How to create A/B test segements for highly variable data

I have a data in which there is a high degree of variability. My Objective is to do an AB test to check the behavior change due to new changes. All samples has shown historically high and low ...
MogambO's user avatar
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1 vote
3 answers
252 views

A/B testing with non-Gaussian distributions

I have two sets of samples (A, B) with a relatively high number (~10,000) and I want to see if a factor has affected sample B or not. Naturally, I should use A/B testing. The problem is, the ...
anishtain4's user avatar
1 vote
0 answers
30 views

Is it necessary to cap test and control metric at same percentile to treat outliers?

I am working on an AB test and the metric I am using to compare test and control is revenue. Both of my test and control have outliers. I am trying to treat outliers and have found that to do so, I ...
Akshay's user avatar
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2 votes
1 answer
79 views

How to select random data for two different recommender systems?

The business problem: We have two different vendors that offer personalized recommender engines and want to do A/B testing with them. The recommendation will give the user a personalized offer via a ...
Remus Raphael's user avatar
1 vote
1 answer
71 views

Significant testing - repeated observation over multiple days

I work in mobile gaming, and want to analyze A/B test groups, but I believe I'm introducing errors in my calculations. The metric I'm looking at is: num of unique players who engaged in battle that ...
user54052's user avatar
2 votes
1 answer
377 views

How to verify A/B test

Is there a way to check the result of A/B test to determine the better one. Suppose, Group A has 100 views and 10 clicks. Group B has 10 views and 2 clicks. How to chose which one produces more ...
John Constantine's user avatar
-1 votes
1 answer
119 views

Testing whether observed control/test split invalidates my assumption of 50/50 randomised traffic

I recently ran a test on site traffic that was designed to be a 50/50 split. I actually observed a 50.7% to 49.3% split (154,490 vs 150,151 visitors). How can I test based on the sample size whether ...
Peter Simpson's user avatar
8 votes
2 answers
2k views

A/B testing: How to calculate p-value on post test segments?

My question on A/B testing is about doing post test segmentation analysis. For example: I run an A/B test on my website to track bounce rate. On the treatment group, i put a video to explain ...
jxn's user avatar
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1 vote
1 answer
170 views

A/B Testing Suitability for Hypothesis

I'm obscuring the data I'm working on, but I think this should get the point across. I'm trying to design a test for the following: A client sells various popsicles. They think that on days when it ...
I_Play_With_Data's user avatar
3 votes
2 answers
130 views

Is it scientifically correct to derive conclusions unrelated to hypothesis from A/B test data

Consider a software A/B test with the hypothesis that "the addition of feature F is predicted to increase metric X". At the end ...
Jon Burgess's user avatar
1 vote
0 answers
55 views

How can one compare these groups?

I have two dataset A and B. We have 93 persons in A and 88 in B. Dataset A contains number of person who had made a payment. So A is ...
Ole Petersen's user avatar
2 votes
3 answers
967 views

How to approach a Data Science case study question?

I recently had a phone interview with a consumer tech company for a quant position. The question was basically, "imagine a facebook style social network site. Six months ago a new feature called '...
idclark's user avatar
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1 vote
1 answer
2k views

Approaches to A/B testing when you can't randomize on the user level

I am trying to find suggestions for different approaches to running tests when it isn't possible to randomly assign users to test and control buckets. For example, if I own 10 shops and have a ...
anthr's user avatar
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7 votes
1 answer
5k views

What does Prec@1 in fastText mean?

In Bag of Tricks for Efficient Text Classification paper which is popular right now, he calculates prec@1 for the datasets in the experimentation segment. What does that mean?
Hima Varsha's user avatar
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5 votes
2 answers
766 views

AB testing : When AA testing doesn't work

After 6 months of AB testing on our CRM tool (Oracle Responsys, but this could be true with anyone), the test exhibited some weird results so we decided to pause everything, and to make some good old ...
WNG's user avatar
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0 votes
1 answer
73 views

Advance Methods of Understanding Significance of Customer Behaviors

I currently own a couple of websites and lately I've been implementing some feature changes - I've noticed some changes in website traffic and I was wondering what some of the more sophisticated ways ...
Helene 's user avatar
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1 vote
0 answers
288 views

A/B Test: Determine if a Lift in Measured Sales is Significant

I am no stats expert so any assistance will be greatly appreciated. I’m working on a post-campaign analysis to determine if any measured sales lift (sales lift per audience) is significant between ...
user2270911's user avatar
4 votes
1 answer
1k views

A/B testing randomization step

Let's say I want to measure a medicine’s impact on height. So I randomly broke down my user base into two groups (control and experiment, obviously). I calculated the average height for both groups ...
Helene 's user avatar
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5 votes
4 answers
10k views

What is the minimum size of the test set?

The mean of a population of binary values can be sampled with about 1000 samples at 95% confidence, and 3000 samples at 99% confidence. Assuming a binary classification problem, why is the 80/20% ...
zzzbbx's user avatar
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3 votes
1 answer
3k views

How would I chi-squared test these simple results from A/B experiment?

I have results from an A/B experiment where users could do one of three things: Watch, Interact, or Nothing My data is like this: ...
OneChillDude's user avatar
2 votes
2 answers
399 views

Retail Store Testing

I am an analyst who is new to retail store testing (for example: customer response to a store new layout or a new product or process in one or 2 stores). Any suggestions for a good book/blog/any ...
26lane's user avatar
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1 vote
0 answers
96 views

Campaign Hypothesis Testing: Is using chi-square test appropriate?

I’ve just gotten the results back from a marketing campaign that consisted of testing new men’s and women’s apparel creative (test creative) against business as usual men’s and women’s creative (...
user2270911's user avatar
1 vote
2 answers
216 views

How to determine if a company decision was successful or not?

I'm trying to figure out if a decision taken in a company (offering discounts for specific products) is successful or not. I have done some research and saw that A/B testing might be a way to do this ...
johan855's user avatar
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