Question: The Drug Symbicort is used to treat asthma In a

The Drug Symbicort is used to treat asthma. In a clinical trial of Symbicort, 18 of 277 treated subjects experienced headaches (based on data from AstraZeneca). The accompanying dI-83/84 Plus calculator display shows results from a test of the claim that less than 10% of treated subjects experienced headaches.
Use the normal distribution as an approximation to the binomial distribution Assume α = 0.05 significance level
a. Is the test two-tailed, left-tailed, or right-tailed?
b. What is the test statistic?
c. What is the P-value?
d. What is the null hypothesis, and what do you conclude about it?
e. What is the final conclusion?

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