1.

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to 6963 subjects randomly selected from an online group involved with ears. There were 1348 surveys returned. Use a 0.01 significance level to test the claim that the return rate is less than 20%. Use the P-value method and use the normal distribution as an approximation to the binomial distribution. Identify the null hypothesis and alternative hypothesis. O A. Ho: p = 0.2 O B. Ho: p #0.2 H1: p #0.2 H1: p = 0.2 O C. Ho: p = 0.2 O D. Ho: p > 0.2 H1: p 0.2 H1: p = 0.2In a recent court case it was found that during a period of 11 years 886 people were selected for grand jury duty and 43% of them were from the same ethnicity. Among the people eligible for grand jury duty, 79.5% were of this ethnicity. Use a 0.01 significance level to test the claim that the selection process is biased against allowing this ethnicity to sit on the grand jury. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-value method and the normal distribution as an approximation to the binomial distribution. Which of the following is the hypothesis test to be conducted? O A. Ho: p 0.795 O D. Ho: p =0.795 H1: p = 0.795 H1: p > 0.795 O E. Ho: p =0.795 OF. Ho: p #0.795 H1: p