The Drug Symbicort is used to treat asthma. In a clinical trial of Symbicort, 18 of 277

Question:

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 as an approximation to the binomial 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?
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...