Week 18-Roadmap

Why do we require to study Samples when Population parameters are given . Like we are finding sample mean and variance when population parameters are already given.

What is its significance in the real world scenario ? Because if we have Population parameters directly, one would not study the samples.

Yes you’re right, but the significance is we might need to find out some other parameter, which is unknown.
Consider we only have a few parameters, and not even the whole population in this case.