Claim: The mean systolic blood pressure of all healthy adults is less than 124 mm Hg. Sample data: For 283 healthy adults, the mean systolic blood pressure level is 121.16 mm Hg and the standard deviation is 15.72 mm Hg. Complete parts (a) and (b). a. Express the original claim in symbolic form. Let the parameter represent a value with respect to systolic blood pressure of a healthy adult. (Type an integer or a decimal. Do not round.) b. Identify the null and alternative hypotheses. Ho: (Type integers or decimals. Do not round.)In a study of 817 randomly selected medical malpractice lawsuits, it was found that 518 of them were dropped or dismissed. Use a 0.05 significance level to test the claim that most medical malpractice lawsuits are dropped or dismissed. Which of the following is the hypothesis test to be conducted? O A. Ho: p > 0.5 OB. Ho: p 0.5 What is the test statistic? z= (Round to two decimal places as needed.) What is the P-value? P-value = (Round to three decimal places as needed.) What is the conclusion about the null hypothesis? O A. Reject the null hypothesis because the P-value is less than or equal to the significance level, a. O B. Fail to reject the null hypothesis because the P-value is less than or equal to the significance level, a. O C. Reject the null hypothesis because the P-value is greater than the significance level, a. O D. Fail to reject the null hypothesis because the P-value is greater than the significance level, a. What is the final conclusion? O A. There is not sufficient evidence to support the claim that most medical malpractice lawsuits are dropped or dismissed. O B. There is not sufficient evidence to warrant rejection of the claim that most medical malpractice lawsuits are dropped or dismissed. O C. There is sufficient evidence to warrant rejection of the claim that most medical malpractice lawsuits are dropped or dismissed. O D. There is sufficient evidence to support the claim that most medical malpractice lawsuits are dropped or dismissed.In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to 6966 subjects randomly selected from an online group involved with ears. There were 1330 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. OA. Ho: P= 0.2 OB. Ho: p > 0.2 H1 : p > 0.2 H1 : p= 0.2 O C. Ho: P = 0.2 OD. Ho: P