A certain drug is used to treat asthma. In a clinical trial of the​ drug, 20 of 289 treated subjects experienced headaches​ (based on data from the​ manufacturer). The accompanying calculator display...








A certain drug is used to treat asthma. In a clinical trial of the​ drug,
20
of 289

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.



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?

Identify the null hypothesis. Decide whether to reject the null hypothesis. Choose the correct answer below.

e. What is the final​ conclusion?





Jun 02, 2022
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