7.1.15 Question H Use the sample data and confidence level given below to complete parts (a) through (d). In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2311 subjects randomly selected from an online group involved with ears. 1057 surveys were returned. Construct a confidence interval for the proportion of returned surveys. E Click the icon to view table of z scores. a) Find the best point estimate of the population proportion p. (Round to three decimal places as needed.)

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