Suppose that we are to observe the independent and identically distributed vectors (X1, Y1), (X2, Y2), . . . , (Xn, Yn), and that we want to use these data to estimate E[X1]/E[Y1]. (a) Give an estimator of . (b) Explain how you could estimate the mean square error of this estimator.

STATS 10 Week 3 Notes: Chapter 4 Lecture 6 Chapter 2: graphically summarize numerical/categorical data Chapter 3: describe a numerical variable's center and spread when its distribution is symmetric/skewed Chapter 4: linear relationship between two numerical variables using statistics and a linear equation We always begin with a graph. Scatterplot Dot plot for 2 numerical variables....