Question

The difference between μ and x¯ is
μ is a population parameter, x¯ is a sample parameter
Both are the mean, hence they are equal
μ is observed, x¯ is conceptual
x¯ is estimated, μ is observed

Answer 1

\[\mu\ is\ a\ population\ parameter,\ \bar {x}\ is\ a\ sample\ parameter\]

Answer 2

so where you have doubt.whatever you have written is right.