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Refer to the data of Example 17 2 If a total

Refer to the data of Example 17.2. If a total sample of 100 colleges is to be taken, determine how many of these should be 4-year schools under each of the following schemes.

a. Proportional allocation

b. Optimum allocation, assuming the stratum population standard deviations are the same as the corresponding sample values

a. Proportional allocation

b. Optimum allocation, assuming the stratum population standard deviations are the same as the corresponding sample values

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