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A certain drug is used to treat asthma. In a clinical trail of the drug, 23...

A certain drug is used to treat asthma. In a clinical trail of the drug, 23 of 294 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:

a. is the test two-tailed, left tailed, or right tailed?

b. what is the test statistic? z =

c. what is the p value?

d. what is the null hypothesis?

e. do you reject or fail to reject the null hypothesis?

f. what is the final conclusion?

Math   Statistics-And-Probability   
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