# Drop out rate of an A/B test

**URL:** <https://discuss.elastic.co/t/drop-out-rate-of-an-a-b-test/53228>\
**Category:** Kibana\
**Created:** [June 19, 2016, 8:16am UTC](https://discuss.elastic.co/t/drop-out-rate-of-an-a-b-test/53228 "2016-06-19T08:16:18Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![richard.kang](https://avatars.discourse-cdn.com/v4/letter/r/e0b2c6/32.png) [@richard.kang](https://discuss.elastic.co/u/richard.kang)\
**Post date:** [June 19, 2016, 8:16am UTC](https://discuss.elastic.co/t/drop-out-rate-of-an-a-b-test/53228/1 "2016-06-19T08:16:19Z")

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We are conducting an A/B testing of an web app, and in the logs we shows who is using the new page B, and who has decided to switch back to the old page A.

How do I construct a search in Kibana to find out the drop out rate of who has gone from B to A?

Thanks in advance!

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**Author:** ![lukas](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/lukas/32/6812_2.png) [@lukas](https://discuss.elastic.co/u/lukas)\
**Post date:** [June 20, 2016, 6:48pm UTC](https://discuss.elastic.co/t/drop-out-rate-of-an-a-b-test/53228/2 "2016-06-20T18:48:38Z")

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Could you provide a sample of the logs you are generating? Thanks!

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**Author:** ![richard.kang](https://avatars.discourse-cdn.com/v4/letter/r/e0b2c6/32.png) [@richard.kang](https://discuss.elastic.co/u/richard.kang)\
**Post date:** [June 20, 2016, 7:07pm UTC](https://discuss.elastic.co/t/drop-out-rate-of-an-a-b-test/53228/3 "2016-06-20T19:07:11Z")

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> Tue Jun 14 17:32:19 2016 GMT rails 21943-64b2d319-e0ab-47ec-9cdb-09de839bb835 [INFO] (null):0 (null)(): (null): testuser01 has moved to the new CALP, testuser01=NEW\_CALP on 2016-06-14T17:32:19+00:00.  
> Tue Jun 14 17:45:47 2016 GMT rails 28036-ef279ce9-b217-4fd0-94f2-3588a99b0768 [INFO] (null):0 (null)(): (null): testuser01 has switched back to the old CALP, testuser01=OLD\_CALP on 2016-06-14T17:45:47+00:00.

Thanks Lukas

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 6, 2017, 1:49pm UTC](https://discuss.elastic.co/t/drop-out-rate-of-an-a-b-test/53228/4 "2017-07-06T13:49:47Z")

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Closed on July 6, 2017, 1:49pm UTC