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
Karo-lina-s [1.5K]
3 years ago
15

In the notation below, X is the random variable, c is a constant, and V refers to the variance.

Mathematics
1 answer:
Volgvan3 years ago
6 0

Answer:

-V(X + c) = V(X) + c

Step-by-step explanation:

Using the propierties of the variance:

  • <em>The variance of a constant is zero:</em>

<em></em>

<em>Var(k)=0</em>

<em></em>

Where k is an arbitrary constant. So:

-V(c) = 0 is true.

  • <em>If all values are scaled by a constant, the variance is scaled by the square of that constant: </em>

<em></em>

<em>Var(kX)=k^2V(X)</em>

<em></em>

Where k is an arbitrary constant. Therefore:

-V(cX) = c2 V(X) is true.

  • <em>Variance is invariant with respect to changes in a location parameter. That is, if a constant is added to all values of the variable, the variance is unchanged: </em>

<em></em>

<em>Var(X+k)=V(X)</em>

<em></em>

Where k is an arbitrary constant. Hence:

-V(X + c) = V(X) + c is not true.

<em></em>

You might be interested in
A condition expresses a hypothesis about the state of its world at that point in time.a. False b. True
Alina [70]

Answer:

The Correct option is B: True

Step-by-step explanation:

A condition is a state of something with respect to its quality, working order, or appearance at a particular point in time. Hence, a condition can tell if a hypothesis is true or false at that time, but once the condition changes, it can change the conclusion and hence the hypothesis also.

3 0
3 years ago
Factor 6x2 + 192 + 3
skad [1K]

Answer:

213

Step-by-step explanation:

u multiply first then add the rest ez

5 0
2 years ago
Read 2 more answers
Mrs travis wants to have the clown deliver balloons to her secretary's office. Clowns R Fun charges $1.25 per balloon and $6 for
marysya [2.9K]

The <em>correct answer</em> is:


6 balloons.


Explanation:


Let x represent the number of balloons purchased.


We will call the function for Clowns R Fun c(x):

c(x) = 1.25x+6


We will call the function for Singing Balloons s(x):

s(x) = 1.95x+2


We want the amount for Clowns R Fun, c(x) to be less:

c(x) < s(x)

1.25x+6 < 1.95x+2


Subtract 1.25x from each side:

1.25x+6-1.25x < 1.95x+2-1.25x

6 < 0.7x+2


Subtract 2 from each side:

6-2 < 0.7x+2-2

4 < 0.7x


Divide each side by 0.7:

4/0.7 < 0.7x/0.7

5.7 < x

x > 5.7


She must buy more than 5.7 balloons; the next integer up is 6. She must buy 6 or more balloons.

7 0
3 years ago
Read 2 more answers
Don't know need help [pls
NeX [460]

Answer:

56

......................................................

8 0
2 years ago
The blueprint of a rectangular house is 2.5 inches by 1.5 inches. If the scale is 1:20, what is the perimeter of the actual hous
defon

Answer:

160

Step-by-step explanation:

(2.5 x 2)+(1.5 x 2) =8      (perimeter of scale)

8x20 = 160

4 0
3 years ago
Other questions:
  • Suppose the demand for a certain item is given by:
    8·1 answer
  • Lines CD and DE are tangent to circle A as shown below: Lines CD and DE are tangent to circle A and intersect at point D. Arc CE
    14·2 answers
  • Determine the total number of roots of each polynomial function. f (x) = 3x6 + 2x5 + x4 - 2x3
    9·2 answers
  • What are the factors of the following quadratic equation 12=x^2-x
    13·1 answer
  • Simplify XY/YZ ??????
    8·2 answers
  • A circle has an area of 81
    12·1 answer
  • What is that fraction problem
    6·2 answers
  • 2 multiplied by 4 times
    6·2 answers
  • How to the medium in the dot line????!! I don't want my mom to be mad at my grade please!!!!!!
    7·1 answer
  • If 2 = x - 3, then x
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!