In a study of high school students at least 16 years of age, researchers obtained the survey results summarized in the table below (based on data from “Texting While Driving and Other Risk Motor Vehicle Behaviors Among U.S. High School Students” by O’Malley, Shults, and Eaton, Pediatrics, Vol. 131, No.6).   What is the value of the X2 statistic?  Use a 0.05 significance level to test the claim of independence between texting while driving and irregular seat belt use. Are those two risky behaviors independent of each other? Calculate the chi-square manually or using Excel.

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Q: Texting and Seat Belt Use In a study of high school students at least 16 years of age, researchers…

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A: We have given that  p0=39/(32+39)=0.5493 α=0.05

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