Question

Consider an arti_cial data set consisting of the 8 observations (Efron and Tibshirani, 1993):
1:6; 3:5; 4:7; 7:3; 8:6; 12:4; 13:8; 18:1:
Let ^_ be the 25% trimmed mean, computed by deleting the smallest two numbers and the largest
two numbers, and then taking the average of the remaining four numbers.
1. Calculate b seB for B = 20; 200; 2000:
2. Calculate the ideal bootstrap estimate se ^ F (^__). Hint: You may want to use one of the
following packages Combination, gregmisc or TeachingSampling. However, it is suggested
that you _rst try to solve this problem without the aid of any package. JusConsider an arti_cial data set consisting of the 8 observations (Efron and Tibshirani, 1993):
1:6; 3:5; 4:7; 7:3; 8:6; 12:4; 13:8; 18:1:
Let ^_ be the 25% trimmed mean, computed by deleting the smallest two numbers and the largest
two numbers, and then taking the average of the remaining four numbers.
1. Calculate b seB for B = 20; 200; 2000:
2. Calculate the ideal bootstrap estimate se ^ F (^__). Hint: You may want to use one of the
following packages Combination, gregmisc or TeachingSampling. However, it is suggested
that you _rst try to solve this problem without the aid of any package. Jus