Question: A bank has historically found that the average monthly charges in recent years on its credit card were $ 1,350. With an improving economy, they

A bank has historically found that the average monthly charges in recent years on its credit card were $ 1,350. With an improving economy, they suspect that this has increased. A sample of 42 customers resulted in an average monthly charge of $ 1,376.54 with a standard deviation of $ 183.89. Does this data provide statistical evidence that the average monthly charges have increased?

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