# Question

Refer to the data of Exercise 17.4. If a total sample of 100 students is to be taken, determine how many of these should be freshmen and sophomores 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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