Missouri State University
Missouri State University: Introductory Statistics: The Sampling Distribution
A review is provided at the start of this resource, then the more specific discussion of sampling distributions gets under way. Graphs are provided for ease in understanding the material.
Other
Fayetteville State Univ.: Sampling Distributions
A detailed explanation of statistical sampling distributions is provided here. Several graphs are attached to aid in understanding. The sampling distribution of the mean and the Central Limit Theorem are also discussed at this site.