Conducting test to find out average sales

Reference no: EM13112566

Over the past five years, the average amount of sales invoices for Swanson Co. is $120. A random sample of 12 sales invoices from this month averaged $112.85 with a standard deviation of $20.80. Conduct test to find out if average sales invoice this month differs from the historical data. Level of significance a = .05

Reference no: EM13112566

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