Question: 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

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

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