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NeX [460]
3 years ago
12

Consider the probability distribution of a random variable x. Is the expected value of the distribution necessarily one of the p

ossible values of x?
Yes. The expected value can never be a value from the exact value of x.
No. The expected value can be a value different from the exact value of x.
No. The expected value will never be one of its possible values of x.
Yes. The expected value must always be one of its possible values of x.
Explain or give an example.
Mathematics
1 answer:
pav-90 [236]3 years ago
8 0

Answer:

yes . The Expected value must always be one of its possible values of x

Step-by-step explanation:

<u>For example</u> :-

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Does anyone know how to answer this question? Please write your working calculation as well if you do know the answer. Thanks so
krek1111 [17]

Answer:

Mark as brainliest if helped Thanks!

Step-by-step explanation:

funtion is:

y = \frac{x^2 -1}{2x + 1}

therefore \\\frac{dy}{dx}\\ is

\frac{d\frac{x^2 -1}{2x + 1}}{dx}

\frac{\frac{x^2 -1}{2x + 1}}{x}

\frac{x^2 -1}{(2x+1) x}

Now

\int\limits^2_0 {\frac{x^2 +x +1 }{4x^2 +4 + 1} } \, dx

(Calculation of this it too long and it is hard to type on brainly)

here is the answer though....

= 4/5

=0.8

5 0
3 years ago
Add: (3x4 + x2 + 2) + (9x4 - x2 + x)
Contact [7]
The answers are:

A. <span>12x8 + x + 2


B. 3x2 - 2x - 7</span>
3 0
4 years ago
The perimeter of a rectangle is given by the formula P = 2(l + w), what is the value of P if l = 2 cm and w = 1/2 cm?
Sonja [21]

Answer:

\large\boxed{C)\ 5cm}

Step-by-step explanation:

P=2(l+w)\\\\\text{Put}\ l=2cm\ \text{and}\ w=\dfrac{1}{2}cm\ \text{to the formula of the perimeter:}\\\\P=2\left(2+\dfrac{1}{2}\right)=(2)(2)+(2)\left(\dfrac{1}{2}\right)=4+1=5\ cm

8 0
3 years ago
1/a^2-3a+2 + 1/a^2-5a+6 + 2/a^2-8a+15
Inessa [10]

Answer:

\frac{4+16a^3+23a^3}{a^2}

Step-by-step explanation:

Given

1/a^2-3a+2 + 1/a^2-5a+6 + 2/a^2-8a+15

Required

Simplify

1/a^2-3a+2 + 1/a^2-5a+6 + 2/a^2-8a+15

Collect Like Terms

1/a^2 + 1/a^2 + 2/a^2-3a-5a-8a+2+6+15

1/a^2 + 1/a^2 + 2/a^2-16a+23

Add Fractions:

\frac{1+1+2}{a^2} + 16a + 23

\frac{4}{a^2} + 16a + 23

This can be further expressed as:

\frac{4+16a^3+23a^3}{a^2}

4 0
3 years ago
Mrs. Mathews buys deli meat for her kids lunches every week. This week she buys 3.75 pounds of ham. If she used 0.25 pounds of h
Fittoniya [83]

it's good but if u r hard-working

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3 years ago
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