Mathematics, 24.07.2021 17:10, elizavlsc4

Xem xét mô hình sau: Yi = 1 + 2Di + ui
với Di = 0 đối với 20 quan sát đầu và Di = 1 đối với 30 quan sát còn lại.
Bạn cũng được cho biết rằng var() = 300.
(a) Bạn giải thích 1 và 2 như thế nào?
(b) Các giá trị trung bình của hai nhóm bằng bao nhiêu?
(c) Bạn tính phương sai của (1 + 2) như thế nào? Lưu ý: Bạn được cho biết rằng cov(1, 2) = 15

Answers: 2

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 14:10, kiera2599

Abaker makes 186 cookies. some are chocolate chip and some are oatmeal raisin, and both kinds are made with and without nuts, as shown in the table above. because they are more popular, the baker made 2/3 of the cookies chocolate chip. if a chocolate chip cookie is chosen at random, what is the probability that it will have nuts? a) 21/93 b) 21/62 c) 41/93 d) 21/41

Answers: 2

continue

Mathematics, 21.06.2019 19:00, ghazanfarwaheed7967

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Answers: 2

continue

Mathematics, 21.06.2019 21:30, hannahkharel2

Two friends are reading books. jimmy reads a book with 21,356 words. his friend bob reads a book with one-and-a-half times as many words. which expression represents the number of words bob reads?

Answers: 3

continue

Mathematics, 21.06.2019 23:20, kawaiiiiiiii4715

Triangle xyz, with vertices x(-2, 0), y(-2, -1), and z(-5, -2), undergoes a transformation to form triangle x? y? z? , with vertices x? (4, -2), y? (4, -3), and z? (1, -4). the type of transformation that triangle xyz undergoes is a . triangle x? y? z? then undergoes a transformation to form triangle x? y? z? , with vertices x? (4, 2), y? (4, 3), and z? (1, 4). the type of transformation that triangle x? y? z? undergoes is a .

Answers: 2

continue

Do you know the correct answer?

Xem xét mô hình sau: Yi = 1 + 2Di + ui
với Di = 0 đối với 20 quan sát đầu và Di = 1 đối với...