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