[R] generate a vector of random numbers within confines of certain parameters

[Adrian Johnson]

Dear group,

I am trying to generate a vector of random numbers for 20K observation.

however, I want to generate numbers (with 6 decimal places) within the range of
Std. Dev : 2-3
mean  : 4-6

Is there a method to generate numbers with 6 decimal places under
these parameters

thank you.
Adrian