A survey of 150 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take notes. The result of the survey is that 48 out of 150 students responded “yes “. And approximate 95% confidence interval is (0.245, 0.395). Complete parts A through D. ……...a) How would the confidence interval change if the confidence level had been 90% instead of 95%?The new confidence interval would be wider. The new confidence interval would be 0.256 0.384(Round to three decimal places as needed.)b) How would the confidence interval change if the sample size had been 225 instead of 150? (Assume the same sample proportion.)The new confidence interval would be wider. The new confidence interval would be(Round to three decimal places as needed.)c) How would the confidence interval change if the confidence level had been 99% instead of 95%?The new confidence interval would beThe new confidence interval would be(Round to three decimal places as needed.)d) How large would the sample size have to be to make the margin of error one third as big in the 95% confidence interval?The new sample size would have to be.

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survey of 150 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take notes. The result of the survey is that 48 out of 150 students responded “yes “. And approximate 95% confidence interval is (0.245, 0.395). Complete parts A through D.

survey of 150 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take notes. The result of the survey is that 48 out of 150 students responded “yes “. And approximate 95% confidence interval is (0.245, 0.395). Complete parts A through D.

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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Question

A survey of 150 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take notes. The result of the survey is that 48 out of 150 students responded “yes “. And approximate 95% confidence interval is (0.245, 0.395). Complete parts A through D.

……...
a) How would the confidence interval change if the confidence level had been 90% instead of 95%?
The new confidence interval would be wider. The new confidence interval would be 0.256 0.384
(Round to three decimal places as needed.)
b) How would the confidence interval change if the sample size had been 225 instead of 150? (Assume the same sample proportion.)
The new confidence interval would be wider. The new confidence interval would be
(Round to three decimal places as needed.)
c) How would the confidence interval change if the confidence level had been 99% instead of 95%?
The new confidence interval would be
The new confidence interval would be
(Round to three decimal places as needed.)
d) How large would the sample size have to be to make the margin of error one third as big in the 95% confidence interval?
The new sample size would have to be.

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