A certain drug is used to treat asthma. In a clinical trial of the drug, 20 of 280 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 11% 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? O Left-tailed test O Right tailed test O Two-tailed test

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A certain drug is used to treat asthma. In a clinical trial of the drug, 20 of 280 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 11% 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.
1-PropZTest
prop<0.11
z= - 2.062782289
p= 0.0195666587
p= 0.0714285714
n= 280
a. Is the test two-tailed, left-tailed, or right-tailed?
Left-tailed test
O Right tailed test
Two-tailed test
Transcribed Image Text:A certain drug is used to treat asthma. In a clinical trial of the drug, 20 of 280 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 11% 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. 1-PropZTest prop<0.11 z= - 2.062782289 p= 0.0195666587 p= 0.0714285714 n= 280 a. Is the test two-tailed, left-tailed, or right-tailed? Left-tailed test O Right tailed test Two-tailed test
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