Using the method of moments with a trial function g(y) = (y − a)^2 estimate the unknown variance σ^2 > 0 of...

[sofia_mechieva]

Using the method of moments with a trial function g(y) = (y − a)^2 estimate the unknown variance σ^2 > 0 of a normal distribution with a known mean a.
please help me solve this problem, I can't do it for several days

 

[khansaheb]

Using the method of moments with a trial function g(y) = (y − a)^2 estimate the unknown variance σ^2 > 0 of a normal distribution with a known mean a.
please help me solve this problem, I can't do it for several days

How would you use 'method moments' to calculate the variance? What is the equation - according to your textbook/class notes? Please tell us exactly where you're stuck!