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A kitchen cabinet business has primarily homeowners as customers, but also has a few customers that are developers who build multi-unit condominiums. Overall, the average

A kitchen cabinet business has primarily homeowners as customers, but also has a few customers that are developers who build multi-unit condominiums. Overall, the average sale is $15,000, with a median sale of $10,000 and a standard deviation of $4,800. The standard deviation of the mean value for samples of 225 customers would be which of the following?

$4,800

$480

$320

$4.80

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