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 2606 subjects randomly selected from an online group involved with ears. 1079 surveys were returned. Construct a 95% confidence interval for the proportion of returned surveys. Click the icon to view a table of z scores. a) Find the best point estimate of the population proportion p. (Round to three decimal places as needed.) b) Identify the value of the margin of error E. E= (Round to three decimal places as needed.) c) Construct the confidence interval. 0

MATLAB: An Introduction with Applications
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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 2606
subjects randomly selected from an online group involved with ears. 1079 surveys were returned. Construct a
95% confidence interval for the proportion of returned surveys.
Click the icon to view a table of z scores.
a) Find the best point estimate of the population proportion p.
(Round to three decimal places as needed.)
b) Identify the value of the margin of error E.
E=
(Round to three decimal places as needed.)
c) Construct the confidence interval.
0<P<0
<p
(Round to three decimal places as needed.)
d) Write a statement that correctly interprets the confidence interval. Choose the correct answer below.
OA. One has 95% confidence that the sample proportion is equal to the population proportion.
OB. 95% of sample proportions will fall between the lower bound and the upper bound.
OC. One has 95% confidence that the interval from the lower bound to the upper bound actually does
contain the true value of the population proportion.
OD. There is a 95% chance that the true value of the population proportion will fall between the lower bound
and the upper bound.
Transcribed Image Text: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 2606 subjects randomly selected from an online group involved with ears. 1079 surveys were returned. Construct a 95% confidence interval for the proportion of returned surveys. Click the icon to view a table of z scores. a) Find the best point estimate of the population proportion p. (Round to three decimal places as needed.) b) Identify the value of the margin of error E. E= (Round to three decimal places as needed.) c) Construct the confidence interval. 0<P<0 <p (Round to three decimal places as needed.) d) Write a statement that correctly interprets the confidence interval. Choose the correct answer below. OA. One has 95% confidence that the sample proportion is equal to the population proportion. OB. 95% of sample proportions will fall between the lower bound and the upper bound. OC. One has 95% confidence that the interval from the lower bound to the upper bound actually does contain the true value of the population proportion. OD. There is a 95% chance that the true value of the population proportion will fall between the lower bound and the upper bound.
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