Refer to the data in Exercise 17.4. Determine the sample size for female individuals in Porvoo, Finland, by under each of the following schemes.

Data From Exercise 17.4

In a stratified random sample of individuals—male and female—in Porvoo, Finland, sample members were asked to share the amount of time they spent on reading (in hours) per week. The results had been recorded and are shown in the accompanying table.

a. Proportional allocation
b. Optimum allocation for the overall population mean

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N₁ ZERS n₁ Male (M) 450 25 8.75 1.25 Female (M) 550 25 14.6 0.94