E( Y - 1) 2. Parent Children in Family of Origin (X) Number of Planned Children (Y) Y - 1 (Y - 1)2 A W 2 w B 0 O W C 3 N D N N E 2 4 E (Y - 1)2 = V At the end of the study, the sociologist had a sample of 500 expectant parents. He estimates that there are 6 million expectant parents in the United States. Given this Information, N =