For Exercises 9–14, use the Wilcoxon signed-rank test to test each hypothesis.
14. Bowling Scores Eight randomly selected volunteers at a bowling alley were asked to bowl three games and pick their best score. They were then given a bowling ball made of a new composite material and were allowed to practice with the ball as much as they wanted. The next day they each bowled three games with the new ball and picked their best score. At the 0.05 level of significance, did scores improve?
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Elementary Statistics: A Step By Step Approach
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