Question

by which symbol is the mean of the observation represented​

Answer 1

Answer:

The symbol 'μ' represents the population mean. The symbol 'Σ Xi' represents the sum of all scores present in the population (say, in this case) X1 X2 X3 and so on.

Answer 2

${ \huge{ \bold{ \green{ \boxed{A}}}{ \boxed{ \color{blue}{n}}}{ \boxed{ \color{purple}{S}}}{ \boxed{ \color{violet}{w}}}}{ \boxed{ \color{brown}{E}}}{ \boxed{ \color{orange}{r}}}}$

The symbol 'μ' represents the population mean. The symbol 'Σ Xi' represents the sum of all scores present in the population (say, in this case) X1 X2 X3 and so on.