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A recent survey of Fortune 500 firms found that on average, they contribute $332.54 per month for each salaried employees health insurance. If you are

A recent survey of Fortune 500 firms found that on average, they contribute $332.54 per month for each salaried employee’s health insurance.  If you are told that almost all salaried employees at Fortune 500 firms receive a health insurance contribution between $220.61 and $444.47, what must the standard deviation for this data be?

a. $37.31

b. $46.65

c. $55.98

d. $74.64

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