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{"ops":[{"insert":"A company wants to select a sample of 1200 customers for a marketing survey in four "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"districts. The following data are availableMarketing "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"region"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"Population "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"Frequency"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"Variability "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"(standard "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"deviation)"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"Cost per unit "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"(Zambian "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"kwacha)"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"District 1 18000 4.3 18"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"District 2 600 6.4 10"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"District 3 12000 9.4 39"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"District 4 24000 7.1 24"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"a) How many persons should be selected from each district;"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"i) In proportion to the population frequency in each district;"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"ii) In proportion to the population frequency and variability in each district;"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"iii) In proportion to the population frequency, variability and cost per unit in each "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"district?"},{"insert":"\n"}]}
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