In a study of the accuracy of fast food​ drive-through orders, Restaurant A had 238 accurate orders and 60 that were not accurate. a. Construct a 90 ​% confidence interval estimate of the percentage...


In a study of the accuracy of fast food​ drive-through orders, Restaurant A had


238


accurate orders and


60



that were not accurate.

a. Construct a
90



​%

confidence interval estimate of the percentage of orders that are not accurate.

b. Compare the results from part​ (a) to this
90


​%

confidence interval for the percentage of orders that are not accurate at Restaurant​ B:


0.187

less thanpless than0.255





.

What do you​ conclude?





a. Construct a
90





​%

confidence interval. Express the percentages in decimal form.



nothing


less thanpless thannothing




​(Round to three decimal places as​ needed.)

b. Choose the correct answer below.












A.


No conclusion can be made because not enough information is given about the confidence interval for Restaurant B.









B.


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.









C.


Since the two confidence intervals​ overlap, neither restaurant appears to have a significantly different percentage of orders that are not accurate.








D.


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.

Jun 03, 2022
SOLUTION.PDF
SOLUTION.PDF

Get Answer To This Question

Related Questions & Answers

More Questions »

Submit New Assignment

Copy and Paste Your Assignment Here
Have files?