1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
USPshnik [31]
3 years ago
6

The bivariate distribution of X and Y is described below: X Y 1 2 1 0.21 0.47 2 0.14 0.18 A. Find the marginal probability distr

ibution of X. 1: .35 2: .65 B. Find the marginal probability distribution of Y. 1: .68 2: .32 C. Compute the mean and variance of X. Mean = .35+1.3 Variance = (.35+2.6)-(.35+1.3)^2 C. Compute the mean and variance of Y.
Mathematics
1 answer:
jasenka [17]3 years ago
8 0

Answer:

Step-by-step explanation:

Given that the bivariate distribution of X and Y is described below:

x 1 2  

y    

1 0.21 0.14 0.35

0 0.47 0.18 0.65

Pdf of Y is

Y     1     0

p    0.68  0.32

C) Pdf of X is

x      1       2

p  0.35  0.65

Mean of X = 1(0.35)+2(0.65)=1.65

Var(x) = E(x^2)-Mean ^2 = 1(0.35)+4(0.65)-1.65^2\\=2.95-2.7225\\=0.2275

C) Mean of Y = 1(0.68)+0 = 0.68

Var(y) = 1(0.68)-0.68^2

= 0.2176

You might be interested in
Solve this for Brainliest!<br><br>See the attachment [Level - GCSE]
madreJ [45]

Answer:

x = 3 + 4\sqrt{3}

Step-by-step explanation:

OPQ is a right angle triangle.

<u>Using Pythagoras</u>

x^{2} + (x+5)^{2} = (x+8)^{2}\\x^{2} + x^{2} + 10x +25 = x^{2} + 16x + 64\\x^{2} + x^{2} - x^{2} + 10x - 16x + 25 - 64 = 0\\x^{2} - 6x -39 = 0

<u>Using quadratic formula</u>

<u />x = \frac{-b \± \sqrt{b^{2}-4ac}}{2a}\\x = \frac{-(-6) \± \sqrt{(-6)^{2}-4(1)(-39)}}{2(1)}\\x = \frac{6}{2} \± \frac{\sqrt{192}}{2}\\x = 3 \± \frac{8\sqrt{3}}{2}\\x = 3 \± 4\sqrt{3}

x = 3 + 4\sqrt{3} = 9.928(4s.f.)

             OR

x = 3 - 4\sqrt{3} = -3.928(4s.f.) (Length can't be negative)

∴ x = 3 + 4\sqrt{3}

3 0
2 years ago
Read 2 more answers
Please answer quickly. Deeply appreciated
damaskus [11]

Answer:

1 Because i learned how to do that but that was hard

Step-by-step explanation:

8 0
2 years ago
The total cost CC (in dollars) to participate in a ski club is given by the literal equation C=85x+60C=85x+60, where xx is the n
Morgarella [4.7K]
First of all why is there 2 similar equation connected to one another?

Second in order to solve this all you need to do is plug in the number and solve for x

For 485

85x+60=485
85x=420
X=5

Do the same thing and you get 3
6 0
3 years ago
Read 2 more answers
Dale keeps all of his pairs of shoes in his closet. select the number of shoes that deal could have in his closet. Mark all that
bekas [8.4K]
As it says he keeps 'pairs' of shoes so the answer has to be an even 'number' - ie B, C and E are all possible answers.
6 0
3 years ago
Read 2 more answers
What is the answer? I can’t find it
monitta

Answer:

B. 360

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • Dave surveyed 80 7th-graders and 90 8th-graders. He found that about 75% of the 7th-graders like pop music, while 80% of the 8th
    8·1 answer
  • Angle A is circumscribed about circle O. What is the measure of angle O? 46
    9·1 answer
  • Write an algebraic equation for the following sentence explaining each step of your reasoning:
    14·1 answer
  • WILL GIVE BRAINLYEST
    7·1 answer
  • I need help ASAP please!! Giving brainlist!!
    8·1 answer
  • Find the value of x?
    8·1 answer
  • H E L P ! !
    10·1 answer
  • Choose the correct classifacation of 4x^4-4x^3+10x^6​
    14·1 answer
  • Help pls help pls help pls
    7·1 answer
  • (Middle school math) please help, thank you
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!