illustLLN         This example illustrates how the LLN forces consecutive arithmetic means of iid r.v.'s to 
                  converge to their expectation --- using E()- and sd()-methods from distrEx.   
illustCLT         This example illustrates how the CLT forces consecutive sums of iid r.v.'s to converge to a normal 
                  distribution; it uses the E()- and sd()-methods from distrEx.   
illustCLT_tcl     This example is a version of the preceding one; it has Tcl/Tk-based widget to control the input
                  arguments of illustCLT and requires Tcl/Tk   
