--- schema_version: "1" id: 27aaa6038039d0932e26e9f8109f3c23850842acae1ac7853def9cf142465fd5 title: A/B Test Intervals collection: admin version: current locale: en-us portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/mc_pers_segment_a_b_test_interval.md canonical_url: https://help.salesforce.com/s/articleView?id=mktg.mc_pers_segment_a_b_test_interval.htm&release=264.0.0&type=5 source_site: help.salesforce.com content_type: documentation content_hash: 155d427e9d55f0bc76b80df048388049a48a58387494d572cd5d2aa93be44caf description: Learn how A/B test segments can split campaign traffic into intervals, such as halves, thirds, and quarters. products: - Marketing - Salesforce Personalization release: "264" --- # A/B Test Intervals Learn how A/B test segments can split campaign traffic into intervals, such as halves, thirds, and quarters. The upper limit for a segment rule isn’t inclusive. If you create a segment to include users between 0% and 5%, the segment includes users with values of 0%, 1%, 2%, 3%, and 4%. The next segment of users, 5% to 10%, includes users with values of 5%, 6%, 7%, 8%, and 9%. Each segment has 5% of the users. These tables list common A/B test intervals. ## 50-50 Split

Group

Configuration

First 50

0–50

Second 50

50–100
## Thirds

Group

Configuration

First third

0–34

Second third

34–67

Third third

67–100
## Fourths

Group

Configuration

First fourth

0–25

Second fourth

25–50

Third fourth

50–75

Fourth fourth

75–100
## Fifths

Group

Configuration

First fifth

0–20

Second fifth

20–40

Third fifth

40–60

Fourth fifth

60–80

Fifth fifth

80–100