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kjbjkTest, at the 5% level of significance, whether the average profit in 2014 differs between businesses located in Parramatta CBD or located in Sydney CBD.
kjbjkTest, at the 5% level of significance, whether the average profit in 2014 differs between businesses located in Parramatta CBD or located in Sydney CBD.
[You may assume that the unknown population standard deviations for Parramatta and Sydney businesses are equal]
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