certain drug is used to treat asthma. In a clinical trial of the​ drug, 18 of 266 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 0.05 significance level to complete parts​ (a) through​ (e) below.   Is the test​ two-tailed, left-tailed, or​ right-tailed?   What is the test​ statistic?   What is the​ P-value?   What is the null​ hypothesis, and what do you conclude about​ it?   Decide whether to reject the null hypothesis. Choose the correct answer below.

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