An Experiment Involves Selecting a Random Sample of 256 Middle

question 6

Multiple Choice

An experiment involves selecting a random sample of 256 middle managers at random for study.One item of interest is their mean annual income.The sample mean is computed to be $35,420 and the sample standard deviation is $2,050.What is the standard error of the mean?

• A)$128.125
• B)$138.36
• C)$2,050
• D)$8.01

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