The bookstore at IRSC would like to estimate the proportion of students who prefer electronic textbooks (eBooks) over printed textbooks (hard copies). A random sample of 30 students was surveyed. Their preferences are listed below. eBook eBook eBook eBook eBook eBook eBook eBook eBook eBook eBook eBook eBook hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy Determine the point estimate, ① and the sample standard deviation, S. Round the sample proportion to four decimal places and round the standard deviation to six decimal places, if necessary. Ŕ Sp Using a 97% confidence level, determine the margin of error, E, and a confidence interval for the proportion of all students at the college who work prefer eBooks over printed textbooks. Report the confidence interval using interval notation. Report the solutions in percent form, rounded to two decimal places, if necessary. The margin of error is given by E = A 97% confidence interval is given by The margin of error for this confidence interval is quite large. What is the best way for the bookstore to achieve a confidence interval with a smaller margin of error? O Decrease the sample size O Increase the sample size O Decrease the level of confidence Increase the level of confidence
The bookstore at IRSC would like to estimate the proportion of students who prefer electronic textbooks (eBooks) over printed textbooks (hard copies). A random sample of 30 students was surveyed. Their preferences are listed below. eBook eBook eBook eBook eBook eBook eBook eBook eBook eBook eBook eBook eBook hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy hard copy Determine the point estimate, ① and the sample standard deviation, S. Round the sample proportion to four decimal places and round the standard deviation to six decimal places, if necessary. Ŕ Sp Using a 97% confidence level, determine the margin of error, E, and a confidence interval for the proportion of all students at the college who work prefer eBooks over printed textbooks. Report the confidence interval using interval notation. Report the solutions in percent form, rounded to two decimal places, if necessary. The margin of error is given by E = A 97% confidence interval is given by The margin of error for this confidence interval is quite large. What is the best way for the bookstore to achieve a confidence interval with a smaller margin of error? O Decrease the sample size O Increase the sample size O Decrease the level of confidence Increase the level of confidence
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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Transcribed Image Text:The bookstore at IRSC would like to estimate the proportion of students who prefer electronic textbooks
(eBooks) over printed textbooks (hard copies). A random sample of 30 students was surveyed. Their
preferences are listed below.
eBook
eBook
eBook
eBook
eBook
eBook
eBook
eBook
eBook
eBook
eBook
eBook
eBook
hard copy
hard copy
hard copy
hard copy
hard copy
hard copy
hard copy
hard copy
hard copy
hard copy
hard copy
hard copy
hard copy
hard copy
hard copy
hard copy
hard copy
Determine the point estimate, ① and the sample standard deviation, S. Round the sample proportion to
four decimal places and round the standard deviation to six decimal places, if necessary.
Sp
Using a 97% confidence level, determine the margin of error, E, and a confidence interval for the
proportion of all students at the college who work prefer eBooks over printed textbooks. Report the
confidence interval using interval notation. Report the solutions in percent form, rounded to two decimal
places, if necessary.
The margin of error is given by E:
=
A 97% confidence interval is given by
The margin of error for this confidence interval is quite large. What is the best way for the bookstore to
achieve a confidence interval with a smaller margin of error?
Decrease the sample size
Increase the sample size
Decrease the level of confidence
Increase the level of confidence
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