Table 1.

Descriptive Statistics for Selected Categorical Variables from the NICHD Study of Early Child Care (1996).

Variable	Values	n
Gender	1. Male	705
	2. Female	659
	Total	1364
Mother’s ethnicity	1. American Indian, Eskimo, Aleutin	8
	2. Asian; Pacific Islander	30
	3. Black; Afro-American	174
	4. White	1127
	5. Other	25
	Total	1364
Mother’s education	1. seven years of schooling	3
	2. eight years of schooling	13
	3. nine years of schooling	20
	4. ten years of schooling	42
	5. eleven years of schooling	61
	6. High school diploma	287
	7. Some college; no degree	455
	8. Bachelor's degree	284
	9. Some graduate work or master's degree	161
	10. law degree	14
	11. PhD; several master’s degrees	23
	Total	1363