Question: A random sample is made of 256- middle managers concerning their annual incomes. The sample mean is computed to be $35,420. If the population standard

A random sample is made of 256- middle managers concerning their

A random sample is made of 256- middle managers concerning their annual incomes. The sample mean is computed to be $35,420. If the population standard deviation is $2,050. What is the standard error of the ' mean

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