Beatnik

Thanks rus1bus for your reply,

But, i did not get the first part, you mean to say that from just one sample drawn (with sample size = 30) if i calculate the mean of that sample, i can assume that, that mean will be the Population mean as well?

I thought I have to draw many samples of 30 each and then i will form a Normal Distribution and then if I calculate the mean of that, that will be equal to the mean of Population!

Pls pardon for my ignorance, i am still confused on this part.