l The Center: Weighted Mean When what you have is grouped data compute the mean using u= 2w;xi/Ew Problem: Calculate the average profit from truck shipments, United States to Canada, for the following data given in thousands of bags and profits per thousand bags Montreal 64.0 Ottawa 15.0 Toronto 285.0 $15,00$13,50 $15.50 Vancouver 228.0 Winnipeg 45.0 1200 100 (Ans: $14.04 per thous. bags o 2002 The Wadsworth GroupThe Center: Weighted Mean • When what you have is grouped data, compute the mean using µ= (Swixi )/Swi Problem: Calculate the average profit from truck shipments, United States to Canada, for the following data given in thousands of bags and profits per thousand bags: Montreal 64.0 Ottawa 15.0 Toronto 285.0 $15.00 $13.50 $15.50 Vancouver 228.0 Winnipeg 45.0 $12.00 $14.00 (Ans: $14.04 per thous. bags) © 2002 The Wadsworth Group