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Use the sample data and confidence level
In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2628 subjects randomly selected from an online group involved with ears. 1189 surveys were returned. Construct a 95% confidence interval for the proportion of returned surveys.
From the provided information,
Sample size (n) = 2628
From which 1189 were returned that is x = 1189
Confidence level = 95%
Step by step
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