A certain drug is used to treat asthma, In a clinical trial of the drug, 18 of 273 treated subjects experienced headaches (based on data from the manufacturer). The accompanying calculator display shows results from a test of the claim that less than 9% of treated subjects experienced headaches. Use the normal distribution as an approximation to the binomial distribution and assume a 0.01 significance level to complete parts (a) through (e) below. 1-PropZTest prop <0.09 z--1.389447351 p-0.0823483801 p-0.0659340659 n-273 b. What is the test statistic? (Round to two decimal places as needed.) c. What is the P-value? P.value = (Round to four decimal places as needed.) d. What is the null hypothesis, and what do you conclude about it? Identify the null hypothesis. O A. Ho: p=0.09 О В. Но: р<0.09 OC. Ho: p#0.09 O D. Ho: p>0.09 Decide whether to reject the null hypothesis. Choose the correct answer below. O A. Fail to reject the null hypothesis because the P-value is greater than the significance level, a. O B. Reject the null hypothesis because the P-value is greater than the significance level, a. OC. Reject the null hypothesis because the P-value is less than or equal to the significance level, a. O D. Fail to reject the null hypothesis because the P-value sless than or equal to the significance level, a. e. What is the final conclusion? O A. There is not sufficient evidence to support the claim that less than 9% of treated subjects experienced headaches. O B. There is not sufficient evidence warrant rejection of the claim that less than 9% of treated subjects experienced headaches.