Reconsider Exercise 1.2.9 about your friend shooting free throws. Which of A–E is the appropriate sample statistic and proper symbol? 

A. p̂ = 0.75 

B. π = 0.75 

C. p̂ = 0.65 

D. π = 0.65 

E. n = 26

Data from Exercises 1.2.9

Suppose a friend of yours says she is a 75% free-throw shooter in basketball. You don’t think she is that good and want to test her to gather evidence that she makes less than 75% of her free throws in the long run. You have her shoot 40 free throws and she makes 26 (or 65%) of them. Which of A–E is an appropriate way to set up the hypotheses, in symbols, for this test?