Suppose we are interested in the behavior of sample proportion of all college students who are over the age of 25, for random samples of a certain size.
a. To draw conclusions about the center of the distribution of sample proportion, do we need to know population proportion, sample size, or both?
b. To draw conclusions about the spread of the distribution of sample proportion, do we need to know population proportion, sample size, or both?
c. To draw conclusions about the shape of the distribution of sample proportion, do we need to know population proportion, sample size, or both?