1998 Summary Sample Design and Sample Size Information
Target Sample Sizes

							All States		Mean for States
	 Number of States			52
			Annual			147,672			2839.8
			Monthly			12,306			236.7

	States with More Than		Geographic	Density		All
		One Stratum			Stratification	Stratification	Stratification

		Number of States			16			35			41
		Total Number of Strata		131			103			259
		Mean Number of Strata		8.19			2.94			6.32

	All States                                  

		Number of States			52			52			52
		Total Number of Strata		167			103			270
		Mean Number of Strata		3.21			1.98			5.19

	Type of Sample Design	Number of States	Source of Sample	Number of States
	Disproportionate Stratified
	  Random					38			Behavioral Surveillance Branch, CDC	29
	Waksberg Cluster				11			GENESYS Sampling Systems			14
	Other						 3				Total GENESYS			43
	Total					52				Survey Sampling, Inc. 			2
										Wisconsin Survey Research Lab 		2
										Other							5
										Total						52

Table4_98.rtf