Chapter 7 - Section 7.5 - Population and Sample Proportions; and the Mean, Standard Deviation, and Shape of the Sampling Distribution of p - Exercises - Page 298: 7.43

Let p be the proportion of all subjects who possess a certain characteristic, p̂ be the proportion of selected subjects who possess a certain characteristic. N=5000, p= 600/5000=0.12 , q=4400/5000=0.88 n= 120, p̂= 18/120 =0.15 Population proportion = p= .12 Sample proportion =p̂ = 0.15

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