How to hide certain questions from 40% of sample ?

You can set quotas and track completion and add condition based on such variables.

https://www.qualtrics.com/support/survey-platform/survey-module/survey-tools/quotas/

You could also create an embedded data and generate a random number from 0 to 100 for every respondent. Then you use that number to display questions. Exaple: if random number is between 0 and 60 show questions. Therefore, if random number is from 60 to 100, the question will not show up. 

Hope this helps.

Hi ​@AlexandreLeduc , i did this and i tested using preview 40 times, means 16times should hide, but it doesnt really. How to make sure it is hiding from 40% of the sample.

Hi,

I assume you’re talking of hiding questions to 40% of the respondents, and not of the sample itself. If you want to apply the rule to the sample, you need to define the selection at the contact list level beforehand.

However, if you want to work at the respondents level, use a randomizer to define your embedded data field. Use the Evenly Present Elements option to be sure to be as near to 40 % as possible, even on small numbers. ​Random numbers will tend to 40% over time, but with only 40 tests, it’s totally normal that variability will be high.

Here’s what you setup should like if you aim for 40%: