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 2649 subjects randomly selected from an online group involved with ears. 1068 surveys were returned. Construct a 99% 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
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 2649 subjects randomly selected from an online group involved with ears. 1068 surveys were returned. Construct a 99% 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
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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![### Confidence Interval Estimation for Proportion
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 2649 subjects randomly selected from an online group involved with ears. 1068 surveys were returned. Construct a 99% 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.
\[ \square \]
(Round to three decimal places as needed.)
---
#### b) Identify the value of the margin of error E.
\[ E = \; \square \]
(Round to three decimal places as needed.)
---
#### c) Construct the confidence interval.
\[ \square < p < \square \]
(Round to three decimal places as needed.)
---
#### d) Write a statement that correctly interprets the confidence interval. Choose the correct answer below.
A. One has 99% confidence that the sample proportion is equal to the population proportion.
B. 99% of sample proportions will fall between the lower bound and the upper bound.
C. There is a 99% chance that the true value of the population proportion will fall between the lower bound and the upper bound.
D. One has 99% confidence that the interval from the lower bound to the upper bound actually does contain the true value of the population proportion.
---
This set of exercises guides you through calculating and interpreting a 99% confidence interval for the proportion of returned surveys in a study about cell phone use and brain hemispheric dominance.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F94a522d8-ef89-4b5b-a14c-d37c6cf2440e%2F50249dd9-49a7-4e01-add1-afcf405a4743%2F9q4lk39_processed.png&w=3840&q=75)
Transcribed Image Text:### Confidence Interval Estimation for Proportion
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 2649 subjects randomly selected from an online group involved with ears. 1068 surveys were returned. Construct a 99% 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.
\[ \square \]
(Round to three decimal places as needed.)
---
#### b) Identify the value of the margin of error E.
\[ E = \; \square \]
(Round to three decimal places as needed.)
---
#### c) Construct the confidence interval.
\[ \square < p < \square \]
(Round to three decimal places as needed.)
---
#### d) Write a statement that correctly interprets the confidence interval. Choose the correct answer below.
A. One has 99% confidence that the sample proportion is equal to the population proportion.
B. 99% of sample proportions will fall between the lower bound and the upper bound.
C. There is a 99% chance that the true value of the population proportion will fall between the lower bound and the upper bound.
D. One has 99% confidence that the interval from the lower bound to the upper bound actually does contain the true value of the population proportion.
---
This set of exercises guides you through calculating and interpreting a 99% confidence interval for the proportion of returned surveys in a study about cell phone use and brain hemispheric dominance.
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