STA5107_FRADE_HW6

# STA5107_FRADE_HW6 - i=1:m for j=1:B(i u1 =...

This preview shows pages 1–3. Sign up to view the full content.

STA5107: Dr. Srivastava Homework 6 Jaime Frade 1. OUTPUT a) mean_x = 579.5333 mean_y = 3.0873 rou = 0.8429 b) Table for the estimates for the standard errors for B B 25 50 100 200 500 1000 2000 5000 standard errors X 48.6809 31.3001 37.166 47.3164 31.5315 38.4516 36.1316 33.3599 standard errors Y 0.2113 0.1878 0.1661 0.1322 0.1995 0.2106 0.2033 0.1437 c) Histograms: At B=2000, can see that histogram correlation coefficients using the random sample and boostrap replicates are very similar.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
STA5107: Dr. Srivastava Homework 6 Jaime Frade CODE clear all clc LawSchoolData ; [m,n] = size(X); n1=15; % obtain a random start num = ceil(rand*5); for i=num:num:n1*num; x1(ceil(i/num),:) = X(i,:); end ; % part a mean_x = mean(x1(:,1)) mean_y = mean(x1(:,2)) rou = corr(x1(:,1),x1(:,2)) sd_x = std(x1(:,1)); sd_y = std(x1(:,2)); % part and c B= [25 50 100 500 1000 2000 5000]; m=size(B); for
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: i=1:m; for j=1:B(i); u1 = randint(1,n1,[1,n1]); for k=1:n1; x2(k,:) = x1(u1(k),:); end ; sd_m1x(j)=std(x2(:,1)); sd_m1y(j)=std(x2(:,2)); rou_m1(j)=corr(x2(:,1),x2(:,2)); end ; sd_m2_x=mean(sd_m1x); sd_m2_y=mean(sd_m1y); rou_m2=mean(rou_m1); for j2=1:B(i); u2 = randint(1,n1,[1,n1]); for k2=1:n1; x3(k2,:) = x1(u2(k2),:); end ; sd_m2x(j2)=std(x3(:,1)); sd_m2y(j2)=std(x3(:,2)); rou_m2(j2)=corr(x3(:,1),x3(:,2)); end ; sd_m2x(end) sd_m2y(end) if B(i)==2000 figure(1) hist(rou_m1); title( 'Bootstrap Method for B=2000' ); figure(2) hist(rou_m2); title( 'Random Sample for B=2000' ); end ; end ; STA5107: Dr. Srivastava Homework 6 Jaime Frade 2. OUTPUT a) B 25 50 100 200 500 1000 2000 standard errors 2.1495 2.0274 1.9761 1.9535 2.0757 2.0858 1.9777 b) CODE 3....
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern