Princess Cruises recently offered a 16-day voyage from Beijing to Bangkok during the time period from May to August.The announced price,excluding airfare,for a room with an ocean view or a balcony was listed as $3,475.Cruise fares usually are quite variable due to discounting by the cruise line and travel agents.A sample of 20 passengers who purchased this cruise paid the following amounts (in dollars) : 
Determine the sampling error for this sample.
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