clinical trial of the drug, 16 of 265 treated subjects experienced headaches (based on data from the manufacturer). The ccompanying calculator display shows results from a test of the claim that less than 11% of treated subjects experienced headaches. Use the normal distribution as Oproximation to the binomial distribution and assume a 0.05 significance level to complete parts (a) through (e) below. . Is the test two-tailed, left-tailed, or right-tailed? ORight tailed test OLeft-tailed test OTwo-tailed test b. What is the test statistic? Z= (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. OA. Ho: P# 0.11 OB. Ho: p=0.11 OC. Ho: p>0.11 OD. Ho: p<0.11 ...