In a study of cell phone use and brain hemispheric dominance, an Internet survey was emailed to 5000 subjects randomly selected from an online group involved with ears. 717 returned. Use a 0.01 significance level to test the claim that the return rate is less than 15%. • What is the critical value? A. -2.33 В. -1.645 C. -1.96 D. -1.44 • What is the test statistic and conclusion? A. -0.91; Reject Ho B. -0.91; Fail to reject Ho C. -1.31; Reject Họ D. -1.31; Fail to reject Ho

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