From Longman Business Dictionary
hypothesishy·poth·e·sis /haɪˈpɒθəsəs-ˈpɑː-/ noun (plural hypotheses /-siːz/) [countableC] STATISTICS an idea that can be tested to see if it is true or notThese results support the hypothesis that individuals are willing to pay more in order to live in communities that provide high-quality services.
→ null hypothesis