9.22 Free throws Activity 9.2B shows you how to use the Significance Test applet at the book's Web site, www.whfreeman.com/sta2e, to test a basketball player's claim that he makes 80% of his free throws. Suppose that the player's claim is true and that you use the applet to shoot 20 shots. (a) What are the mean and standard deviation of the sampling distribution of p, the sample proportion of made free throws? (b) If the player actually makes 8 shots, what is the value of p? (c) Sketch a graph like Figure 9.7 (page 441) that shows the sampling distuil

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