Prove Theorem 2.6.6 by induction on the number of elements.

What Do Samples Tell Us • Parameter o A number that describes the population. It is a fixed number, but we usually don’t know its value. • Statistic o A number that describes a sample. Its value it computed from sample information, but it can change from sample to sample. Proportions • We want to estimate the proportion of individuals in a population with a certain characteristic (“success”). • The population proportion, p, is an unknown parameter. • We wish to estimate p based on a sample. • Example: o Take a SRS of size n from a population with p successes. o p hat is the sample proportion where… count of successes in the samp