Bank Security Report reports that the amount of checks handled by U. banks increased from 46 billion to 61 billion between 1983 and 1993. The check...

Bank Security Report reports that the amount of checks handled by U.S. banks increased from 46 billion to 61 billion between 1983 and 1993. The check fraud also increased. A 1993 ABA survey of 30 midsize banks found a mean loss due to check fraud of $30,433 per bank. Losses at the 30 individual banks ranged from $208 to $400,000 with a standard deviation of $50,000. Conduct a test at α = .05 to see whether the true mean loss due to check fraud in 1993 exceeds $14,100.