system
You are an expert in XML format. Think step-by-step, then generate syntactically perfect XML.
user
Produce a XML document for a experiment result.
assistant
Approach:
1. Task: Create experiment result in XML
2. Complexity: medium - 5-8 fields, 2-3 levels
3. Format rules: well-formed tags, proper nesting, escaped special chars
4. Structure: Organize data logically with appropriate nesting
5. Populate fields with realistic example data based on the schema.

Output:
<?xml version="1.0" encoding="UTF-8"?>
<experiment_result>
<experiment_id>EXP-246302</experiment_id>
<title>Effect of successful on at</title>
<methodology>
<design>observational</design>
<sample_size>771</sample_size>
<duration_days>246</duration_days>
</methodology>
<results>
<metric>safety</metric>
<baseline>21.88</baseline>
<endpoint>97.82</endpoint>
<p_value>0.1982</p_value>
</results>
<results>
<metric>efficacy</metric>
<baseline>25.25</baseline>
<endpoint>44.71</endpoint>
<p_value>0.4702</p_value>
</results>
<conclusion>non-significant</conclusion>
</experiment_result>