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
prohojiy [21]
3 years ago
12

Which of the following is not a property of a chi-square distribution?

Mathematics
1 answer:
laiz [17]3 years ago
6 0

Answer:

c) Is not a property (hence (d) is not either)

Step-by-step explanation:

Remember that the chi square distribution with k degrees of freedom has this formula

\chi_k^2 = \matchal{N}_1^2 +  \matchal{N}_2^2 + ... + \, \matchal{N}_{k-1}^2 +  \matchal{N}_k^2

Where N₁ , N₂m .... N_k are independent random variables with standard normal distribution. Since it is a sum of squares, then the chi square distribution cant take negative values, thus (c) is not true as property. Therefore, (d) cant be true either.

Since the chi square is a sum of squares of a symmetrical random variable, it is skewed to the right (values with big absolute value, either positive or negative, will represent a big weight for the graph that is not compensated with values near 0). This shows that (a) is true

The more degrees of freedom the chi square has, the less skewed to the right it is, up to the point of being almost symmetrical for high values of k. In fact, the Central Limit Theorem states that a chi sqare with n degrees of freedom, with n big, will have a distribution approximate to a Normal distribution, therefore, it is not very skewed for high values of n. As a conclusion, the shape of the distribution changes when the degrees of freedom increase, because the distribution is more symmetrical the higher the degrees of freedom are. Thus, (b) is true.

You might be interested in
100 pts/ x3+y3+z3=k
lesya692 [45]

Answer:

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

Step-by-step explanation:

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

3 0
2 years ago
What are the different types of gons. (hexagon, octagon, decagon)
Colt1911 [192]
There could be one more pentagon 

**As far as I know 
3 0
3 years ago
Which of the following formulas would find the surface area of a right cylinder
Sliva [168]

Answer:

A and B

Step-by-step explanation:

Because the surface area is \pi r^2*2\pi rh

BA is the base, so BA + 2\pi rh also works.

6 0
3 years ago
Write a quadratic function in standard form having zeros of -9 and -12
tia_tia [17]
(x + 9)(x + 12) = 0
Expanding the brackets, we get:
x^{2}+21x+108=0
3 0
3 years ago
In each bouquet of flowers, there are 5 roses and 8 white carnations. Complete the table to find
VLD [36.1K]

Answer:

25 roses and 40 white carnations

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • Which is an equation in point-slope form for the given point and slope? Point:(2,-6) Slope:-3/4
    13·1 answer
  • (8x+1)+(4x+11)=180°<br>solve for x
    12·1 answer
  • Find the value of x so that the function has the given value.<br><br> j(x)=−4/5x+7; j(x)=−5
    13·1 answer
  • What percentage of 250 is 25?
    10·2 answers
  • The center of an ice rink is located at (0, 0) on a coordinate system measured in meters. Susan is skating along a path that can
    11·2 answers
  • Right 20 7 and 500/22000 in decimal form
    13·2 answers
  • What object is defined using a directrix and a focus
    13·2 answers
  • Brainliest if you help me only answer if you know pls and thanks you
    10·2 answers
  • Mr. Pham mowed 2/7 of his lawn. his son mowed 1/4 of the lawn who mowed the most? How much of the lawn still needs to be mowed
    12·2 answers
  • The radius is longer than a chord that doesn't pass through the centre.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!