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the credit manager of large department store claims that the average account balance of store's costumer is atleast $124, and a standard deviation is known
the credit manager of large department store claims that the average account balance of store's costumer is atleast $124, and a standard deviation is known to be $50. an auditor selects a random sample of 109 accounts at random and observes that the sample balance is $121.1
What is the Z-statistic for this test? Round this answer to 2 decimal places.
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