Explain the process used to obtain the results

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Reference no: EM13130643

An engineering firm is evaluating their back charges. They claim that their average back charge is $1800. They randomly select 40 customers, and calculate the sample mean back charge to be $1925. If the standard deviation of back charges is $600, and alpha = 0.05, test the claim of the engineering firm. Perform an appropriate hypothesis test, showing the necessary calculations and/or explaining the process used to obtain the results.

Reference no: EM13130643

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