A check-cashing service company found that approximately7%of all checks submitted to the service were without sufficient funds.

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A check-cashing service company found that approximately7%of all checks submitted to the service were without sufficient funds. After instituting a random check verification system to reduce its losses, the service company found that only 70 were rejected in a random sample of 1125 that were cashed. Is there sufficient evidence that the check verification system reduced the proportion of bad checks at α = 0.01? What is the p-value associated with the test? What would you conclude at the α = 0.05 level?
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Mathematical Statistics With Applications In R

ISBN: 9780124171138

2nd Edition

Authors: Chris P. Tsokos, K.M. Ramachandran

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