MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Transcribed Image Text:In a study of the accuracy of fast food drive-through orders, Restaurant A had 332 accurate orders and 71 that were not accurate.
a. Construct a 95% confidence interval estimate of the percentage of orders that are not accurate.
b. Compare the results from part (a) to this 95% confidence interval for the percentage of orders that are not accurate at Restaurant B: 0.163 <p<0.229. What do you
conclude?
a. Construct a 95% confidence interval. Express the percentages in decimal form.
<p< (Round to three decimal places as needed.)
b. Choose the correct answer below,
O A. Since the upper confidence limit of the interval for Restaurant B is higher than both the lower and upper confidence limits of the interval for Restaurant A, this
indicates that Restaurant B has a significantly higher percentage of orders that are not accurate.
B. Since the two confidence intervals overlap, neither restaurant appears to have a significantly different percentage of orders that are not accurate.
O C. No conclusion can be made because not enough information is given about the confidence interval for Restaurant B.
O D. The lower confidence limit of the interval for Restaurant B is higher than the lower confidence limit of the interval for Restaurant A and the upper confidence
limit of the interval for Restaurant B is also higher than the upper confidence limit of the interval for Restaurant A. Therefore, Restaurant B has a significantly
higher percentage of orders that are not accurate.
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