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A sample of 20 account balances of a credit company showed a mean customer balance of...

A sample of 20 account balances of a credit company showed a mean customer balance of $4,200, but the marketing manager claimed that the mean balance for the population was $4410. The marketing manager did NOT have the population standard deviation, but the sample standard deviation was found to be $600. Use the p-value approach to conduct a full hypothesis test that can be used to determine whether the mean of all account balances is significantly different from $4410. Let α = .10

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