Mathematics, 16.07.2020 04:01 fayth1760
Suppose E(X) = 5 and E[X(X-1)] = 27.5. What is E(X2)? V(X)? The general relationship among the quantities E(X), E[X(X-1)], and V(X)?
Answers: 2
![E(X^2)=32.5\\V(X)=7.5\\E[X(X-1)]=E(X^2)-E(X)\\V(X)=E(X^2)-[E(X)]^2](/tpl/images/0707/6537/e11f4.png)
![E( X + Y ) = E(X) + E(Y)\\V(X) = E(X^2)-[E(X)]^2](/tpl/images/0707/6537/a1d30.png)
, we get:
by 5 and 
Another question on Mathematics
Mathematics, 21.06.2019 14:40
Given the statements, "a square root of 16 is 4," and "a square root of 9 is -3," complete the following blanks with the correct truth-values. p is and q is , so the statement, "a square root of 16 is 4 or a square root of 9 is -3" is .
Answers: 3
Mathematics, 21.06.2019 16:20
The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.
Answers: 3
Mathematics, 21.06.2019 18:30
Solve 2x2 + 8 = 0 by graphing the related function. there are two solutions: . there are no real number solutions. there are two solutions: 2 and -2
Answers: 3
Mathematics, 21.06.2019 20:00
Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0
Answers: 2
You know the right answer?
Suppose E(X) = 5 and E[X(X-1)] = 27.5. What is E(X2)? V(X)? The general relationship among the quant...
Questions
Geography, 28.10.2019 23:31
English, 28.10.2019 23:31
History, 28.10.2019 23:31
History, 28.10.2019 23:31
English, 28.10.2019 23:31
Mathematics, 28.10.2019 23:31
Physics, 28.10.2019 23:31
Health, 28.10.2019 23:31
Mathematics, 28.10.2019 23:31
Mathematics, 28.10.2019 23:31
Mathematics, 28.10.2019 23:31
Chemistry, 28.10.2019 23:31
