n a study of store checkout-scanners, 1234 items were checked for price accuracy; 20 checked items were found to be over charges, and 1214 we're not over charges. Use a 0.05 significance level to test the claim that with scanners, one percent of sales are over charges. a) before scanners were introduced, the overcharge rate was estimated to be about 1%. Based on the results of the study, do scanners appear to help consumers avoid overcharges? (Yes/No), because a (Larger/smaller) proportion of the sampled items are overcharges. It appears that the error rate is (worse/better/ about the same) with scanners than was before.
n a study of store checkout-scanners, 1234 items were checked for price accuracy; 20 checked items were found to be over charges, and 1214 we're not over charges. Use a 0.05 significance level to test the claim that with scanners, one percent of sales are over charges. a) before scanners were introduced, the overcharge rate was estimated to be about 1%. Based on the results of the study, do scanners appear to help consumers avoid overcharges? (Yes/No), because a (Larger/smaller) proportion of the sampled items are overcharges. It appears that the error rate is (worse/better/ about the same) with scanners than was before.
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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In a study of store checkout-scanners, 1234 items were checked for price accuracy; 20 checked items were found to be over charges, and 1214 we're not over charges. Use a 0.05 significance level to test the claim that with scanners, one percent of sales are over charges.
a) before scanners were introduced, the overcharge rate was estimated to be about 1%. Based on the results of the study, do scanners appear to help consumers avoid overcharges? (Yes/No), because a (Larger/smaller) proportion of the sampled items are overcharges. It appears that the error rate is (worse/better/ about the same) with scanners than was before.
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