Answer: A formal analysis survey
Explanation: Surveys may be informal, this is where participants are asked questions singly or in a group. However, asking them in groups is more common.
In contrast, in formal or structured surveys, respondents are interviewed individually. When this is done with surveys instead of an interview, the survey makes use of close-ended questions which require yes, no or other such specific answers. The form of survey you are using can therefore be referred to as a close-ended formal analysis survey.