Minor Issue in Problem 1.12 Solution

[LearningLearning9]

Hello Zhengqi,
first thanks for the publication of the solution manual!

Starting after the paragraph

For E[σ2 ML ], we need to take advantage of (1.56) and what has been given in the problem :
I believe that in the solution to problem 1.12 the \( 1/N \) went missing in the fifth and sixth line of the equations in the last expression with expecation of µ^2_{ML}

The seventh line is correct again.

Keep up the great work!

Greetings
Markus