Many grocery stores have self-checkout scanners so that customers can check out faster. Some customers are concerned that the scanners will be wrong and overcharge them. However, the manufacturer of the scanners indicates that scanners will err in favor of the customer most of the time. A random sample of 500 customers resulted in the following contingency table: Price Charged Undercharged Overcharged Correct Price Self Checkout 20 15 Checkout Method 200 Employee Checkout 10 30 225 Using a -5%, can we conclude that the price charged using scanners is independent of whether a customer checks themselves out or if a store employee checks them out?
Many grocery stores have self-checkout scanners so that customers can check out faster. Some customers are concerned that the scanners will be wrong and overcharge them. However, the manufacturer of the scanners indicates that scanners will err in favor of the customer most of the time. A random sample of 500 customers resulted in the following contingency table: Price Charged Undercharged Overcharged Correct Price Self Checkout 20 15 Checkout Method 200 Employee Checkout 10 30 225 Using a -5%, can we conclude that the price charged using scanners is independent of whether a customer checks themselves out or if a store employee checks them out?
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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