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
what is the minimum sample size you need in order to be able to make a valid statistical inference?
user
the minimum sample size required to make a valid statistical inference depends on the desired level of confidence and the population standard deviation. generally, a sample size of at least 30 is recommended in order to gain sufficient accuracy of the estimated population value.
assistant