as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
formulate a few a/b testing hypotheses that could be used to test the effectiveness of a website's landing page.
user
a/b testing hypotheses that can be used to test the effectiveness of a website’s landing page include: 
1. there is a significant difference in the number of conversions between a landing page with a headline that uses a question and a landing page with a headline that uses a call to action. 
2. there is a significant difference in the number of conversions between a landing page with a single headline and a landing page with multiple headlines.  
3. there is a significant difference in the number of conversions between a landing page with a long form and a landing page with a short form.
assistant