[Lesson 2.14: Estimation.) BONUS: Consider two estimators. T1 and T2. for an unknown parameter 3. Suppose that the Bias(T1} = 0. Bios (13} = 6', Varle) : 462 . and Var{T2) : 62. Which estimator might you decide to use and why? Q a. T1 it has lower expected value 0 b.T1 it has lower MSE Q c. T2 it has lower variance 0 d.T2 - it has lower MSE (Lesson 2.16: Condence Intervals} BONUS: Suppose we collect the following observations: 7, 2?1?6{as in a previous question in this homework}. Let's assume that these guys are i.i.d. from a normal distribution with unknmun variance 0'2. Give me a twosided 95% condence interval for the mean '11,. O a. [2, 7] O b. [3.75, 9.75] O c. [5.75, 6.75] o d. [3.75, 9.75]