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
abruzzese [7]
3 years ago
9

In electrical engineering, the unwanted "noise" in voltage or current signals is often modeled by a Gaussian (i.e., normal) dist

ribution. Suppose that the noise in a particular voltage signal has a constant mean of 0.9 V, and that two noise instances sampled τ seconds apart have a bivariate normal distribution with covariance equal to 0.04e–jτj/10. Let X and Y denote the noise at times 3 s and 8 s, respectively. (a) Determine Cov(X, Y).
Mathematics
1 answer:
vladimir1956 [14]3 years ago
5 0

Answer:

Cov(X, Y) =0.029.

Step-by-step explanation:

Given that :

The noise in a particular voltage signal has a constant mean of 0.9 V. that is μ = 0.9V ............(1)

Also, the two noise instances sampled τ seconds apart have a bivariate normal distribution with covariance.

0.04e–jτj/10 ............(2)

Having X and Y denoting the noise at times 3 s and 8 s, respectively, the difference of time = 8-3 = 5seconds.

That is, they are 5 seconds apart,

τ = 5 seconds..............(3)

Thus,

Cov(X, Y), for τ = 5seconds = 0.04e-5/10

= 0.04e-0.5 = 0.04/√e

= 0.04/1.6487

= 0.0292

Thus, Cov(X, Y) =0.029.

You might be interested in
Wat r partial products of 452×12
Dennis_Churaev [7]
400×10=4000
400×2=800
50×10=500
50×2=100
2×10=20
2×2=4

4000+800+500+100+20+4=5,424
Check answer by multiplying 452 and 12
452×12=5,424
5 0
3 years ago
A serological test is being devised to detect a hypothetical chronic disease. 500 individuals were referred to a laboratory for
andriy [413]

Answer: the predictive value positive of the test is 0.7

Step-by-step explanation:

Given that;

                                              Predicted

                                             Diesease                No-Diesease                Tt

Actual              Diesease           225                           75                         300

No-Diesease         25                175                            200

                                                  250                           250                       500

so finding the predictive value positive of the test,

predictive negative value = (175 / (75+175) )

= 175 / 250

= 0.7

Therefore the predictive value positive of the test is 0.7

7 0
3 years ago
What's the correct equation?
alexgriva [62]

Answer:

C

Step-by-step explanation:

y=mx+b where m is the slope or weekly payments and b is the y-intercept or initial fee.

300 = 30w + 60 fits this

7 0
1 year ago
A toy train car is 6in.long. if a real train car is 75 ft long , which of the following have the same constant of proportionalit
agasfer [191]

A toy train and a real train are similar shapes, then their dimensions are proportional. The ratio is \dfrac{real}{toy} =\dfrac{75}{6} =\dfrac{25}{2}.

Find ratios in all options:

A. \dfrac{real}{toy} =\dfrac{12.5}{12} =\dfrac{25}{24} (incorrect).

B. \dfrac{real}{toy} =\dfrac{50}{9} (incorrect).

C. \dfrac{real}{toy} =\dfrac{37.5}{3} =\dfrac{125}{10} =\dfrac{25}{2} (correct).

D. \dfrac{real}{toy} =\dfrac{50}{4} =\dfrac{25}{2} (correct).

Answer: correct choices are C and D.

4 0
3 years ago
5000-300+200divided by 20
alekssr [168]
The answer is 4710 is the correct answer
8 0
3 years ago
Read 2 more answers
Other questions:
  • How many 5 pound bags of apples can be made from 400 apples each weighing 1/4 pound?
    13·2 answers
  • A pelican is flying 120 feet above sea level. The pelican dives to catch a fish that is 35 feet below sea level. Which number re
    15·1 answer
  • There are 6 times as many chickens as roosters at the farm. There are 4 roosters at the farm. How many chickens are there at the
    10·2 answers
  • I need help give real answers
    6·1 answer
  • A number x divided by -1 is at less than 45
    8·2 answers
  • <img src="https://tex.z-dn.net/?f=y%3D%2082%281.045%29" id="TexFormula1" title="y= 82(1.045)" alt="y= 82(1.045)" align="absmiddl
    9·1 answer
  • Janet worked 3 hours more than David and 7 hours less than Kate. David earned $7.50 per hour, Janet earned $6 per hour, and Kate
    5·1 answer
  • find the greatest possible length which can be used to measure exactly the lengths 4m 95cm; 9m and 16m 65cm?​
    13·1 answer
  • Natasha was thinking of a number. Natasha divides by 5, then adds 11 to get an answer of 11. What was the original number?
    8·1 answer
  • Use implicit differentiation to find an equation of the tangent line to the curve at the given point.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!