SOLUTION: Use the sample data and confidence level given below to complete part (a).
In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed
Algebra.Com
Question 1182739: Use the sample data and confidence level given below to complete part (a).
In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2394 subjects randomly selected from an online group involved with ears. 931 surveys were returned. Construct a 90% confidence interval for the proportion of returned surveys.
a) Find the best point estimate of the population proportion p.
__
(Round to three decimal places as needed.)
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
p hat is 931/2394=0.3889
90% half-interval is z(0.95)*sqrt(p*(1-p)/n)
=1.645*sqrt(0.3889*0.6111/2394)
=0.016
so the interval is (0.373, 0.405)
RELATED QUESTIONS
A study of 420,098 cell phone users found that 139 of them developed cancer of the brain... (answered by Boreal)
A study of 420,065 cell phone users found that 136 of them developed cancer of the brain... (answered by Boreal)
Use the sample data and confidence level given below to complete part a.
A research... (answered by CPhill)
A study of 420,095 Danish cell phone users found that 135 of them developed cancer of the (answered by stanbon)
Use the given level of confidence and sample data to construct a confidence interval for... (answered by stanbon)
Use the sample data and confidence level given below to complete parts (a) through... (answered by ikleyn)
Use the sample data and confidence level given below to complete parts (a) through... (answered by ikleyn)
Use the sample data and confidence level given below to complete parts (a) through... (answered by ikleyn)
Use the sample data and confidence level given below to complete parts (a)... (answered by math_tutor2020)