Last year the records of dairy land inc a convenience store

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Reference no: EM13632655

Last year the records of Dairy Land Inc., a convenience store chain, showed the mean amount spend by a customer was $30. A sample of 20 transactions this month revealed the mean amount spend was $33 with a standard deviation of $12. At the 0.1 level of significance, can we conclude that the mean amount spend has increased?

Reference no: EM13632655

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