Refer to the data of Exercise 17.27. If 80 managers were sampled, determine how many sample members would be from subdivision 1 under each of the following schemes.

a. Proportional allocation
b. Optimum allocation, assuming that the stratum population standard deviations are the same as the corresponding sample quantities

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Subdivision 1 352 30 9.2 4.9 Subdivision 2 Subdivision 3 20 12.3 6.4 287331 30 13.5 7.6 Ii si