A food company sells salmon to various customers. The mean weight of the salmon is 29 lb with a standard deviation of 4 lbs. The company ships them to restaurants in boxes of 4 ​salmon, to grocery stores in cartons of 36 ​salmon, and to discount outlet stores in pallets of 121 salmon. To forecast​ costs, the shipping department needs to estimate the standard deviation of the mean weight of the salmon in each type of shipment.  ​a) Find the standard deviations of the mean weight of the salmon in each type of shipment.   Find the standard deviation of the mean weight of the salmon in the boxes sold to restaurants.   SDy=

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