## How is an AB lift test calculated?

You calculate lift by splitting your list into two groups: one group gets the mailing and the other one doesn’t. Then you track revenue from both groups and work out the difference in revenue per customer. What I wanted to add is that this logic also applies A/B testing on your website.

## Is my AB test significant?

Ideally, all A/B test reach 95% statistical significance, or 90% at the very least. Reaching above 90% ensures that the change will either negatively or positively impact a site’s performance. The best way to reach statistical significance is to test pages with a high amount of traffic or a high conversion rate.

**How long does an AB test take?**

For you to get a representative sample and for your data to be accurate, experts recommend that you run your test for a minimum of one to two week. By doing so, you would have covered all the different days which visitors interact with your website.

**What does AB testing stand for?**

split testing

A/B testing (also known as split testing) is the process of comparing two versions of a web page, email, or other marketing asset and measuring the difference in performance. You do this giving one version to one group and the other version to another group. Then you can see how each variation performs.

### What’s a good sample size?

A good maximum sample size is usually 10% as long as it does not exceed 1000. A good maximum sample size is usually around 10% of the population, as long as this does not exceed 1000. For example, in a population of 5000, 10% would be 500.

### How is Sig Stat calculated?

Start by looking at the left side of your degrees of freedom and find your variance. Then, go upward to see the p-values. Compare the p-value to the significance level or rather, the alpha. Remember that a p-value less than 0.05 is considered statistically significant.

**What is p-value in AB testing?**

P-value is created to show you the exact probability that the outcome of your A/B test is a result of chance. And based on that, statistical significance will show you the exact probability that you can repeat the result of your A/B test after publishing it to your whole audience, too. So they are pretty useful things.

**How many users do you need for AB testing?**

1000 users will usually work, but 10,000 really will show results.

#### When should you stop doing AB tests?

Keep going until you reach 95-99% statistical significance. Make sure your sample size is large enough (at least 1,000 conversions). Don’t stop running your test too soon. Aim for 1-2 weeks.