Hi I'm not sure how to find which estimator is unbiased for the true difference as well as which is the better estimator. Thank you!

X GBE HW5 - X *WK 6 H X SS1 EVE X Quiz: Ho X (1 unrea X SS1 EVE X BE SS1 EVE X Medi s.ucdavis.edu/courses/729517/quizzes/179605/take Consider sampling from two independent populations. Population A has mean MA = 2/ and variance o = 0 while population B has mean MB = / and variance ? = 102. We are interested in estimating the difference in the population means with two estimators: 01 = 5X 40 - - Y 30 02 = ~X 40 - -Y 30 where X 40 is the sample mean from a size 40 random sample of population A and Y 30 is the sample mean from a size 30 random sample of population B. Assume X 40 and Y 30 are independent. Which of the estimators are unbiased for the true difference in the population means 0 = HA - MB = H? Both 01 and 02 are biased. O 01 is unbiased, but @2 is biased. Both 01 and 02 are unbiased. 1 is biased, but 02 is unbiased. O There is not enough information to determine whether the estimators are unbiased