When the owner of a small business reviews her list of contracts for 2011, she finds that 35% of the contracts were from clients she met at a large conference at the end of 2010. Answer the following questions about this situation
A Was this measurement obtained by a sample or a census? What words in the description of the situation make you confident that your answer is correct?
B. Should the owner have taken into account some measure of reliability associated with the value 35%.