In a study of the accuracy of fast food drive-through orders, Restaurant A had 241 accurate orders and 7171 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: 0.212 less than<pless than<0.292 What do you conclude?

In a study of the accuracy of fast food drive-through orders, Restaurant A had 241 accurate orders and 7171 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: 0.212 less than<pless than<0.292 What do you conclude?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 1GP

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Concept explainers

Average

In mathematics, everyone must have heard the term average in one place or other. Almost all types of calculation require taking out an average. In everyday life, the term is used for denoting a certain amount that can be said to be a typical quantity for multiple people or objects. In other words, if a group of people possesses a certain object, then the average gives us an idea regarding the quantity of the object possessed by each person. However, this is solely based on mathematical calculation. It is important to note that most people will not strictly have the average value in a group.

Question

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

241

accurate orders and

7171

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:

0.212 less than<pless than<0.292

What do you conclude?

Definition Definition Method in statistics by which an observation’s uncertainty can be quantified. The main use of interval estimating is for describing a range that is made by transforming a point estimate by determining the range of values, or interval within which the population parameter is likely to fall. This range helps in measuring its precision.

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