3 years ago

PLSSSSSS HELP GIVING 10 POINTS

Mathematics

1 answer:

TEA [102]3 years ago

6 0

Answer:

I'm pretty sure that it's C.

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Let $\mu$ and $\sigma^2$ denote the mean and variance of the random variable x. determine $e[(x-\mu)/\sigma]$ and $e{[((x-\mu)/\

Nezavi [6.7K]

$\mathbb E\left(\dfrac{X-\mu}{\sigma}\right)=\dfrac1\sigma\mathbb E(X)-\dfrac\mu\sigma=\dfrac{\mu-\mu}\sigma=0$

$\mathbb E\bigg(\left(\dfrac{X-\mu}\sigma\right)^2\bigg)=\dfrac1{\sigma^2}\mathbb E\left(X^2-2\mu X+\mu^2\right)=\dfrac{\mathbb E(X^2)-2\mu\mathbb E(X)+\mu^2}{\sigma^2}$
$=\dfrac{\mathbb E(X^2)-2\mu^2+\mu^2}{\sigma^2}=\dfrac{\mathbb E(X^2)-\mu^2}{\sigma^2}=\dfrac{\mathbb E(X^2)-\mathbb E(X)^2}{\sigma^2}$
$=\dfrac{\mathbb V(X)}{\sigma^2}=\dfrac{\sigma^2}{\sigma^2}=1$

3 0

4 years ago

Harry ate 3/8 of a large pizza. Aidan ate 1/2 of a small pizz. Harry said that since 4/8 is equivalent to 1/2,he and Aidan ate t

-BARSIC- [3]

Harry is incorrect. If Harry only ate 3/8 of the pizza and Aidan ate 1/2 of the pizza, Harry ate less pizza. Because 1/2 equals 4/8 and 4/8 is greater than 3/8, Aidan ate more pizza than Harry.

Hope this helps!!

5 0

3 years ago

What\ would b the radius of a circle with a diameter of 8 inches\

Romashka-Z-Leto [24]

Hey!

We know that d = 2r
where,
r - radius
d - diameter
Since it is given that d = 8 inches = 20.32 cm
Therefore,
radius ( r ) = d/2
= 8/2
= 4 inches = 10.16 cm //

7 0

4 years ago

22.

eduard

Answer:5:1

Step-by-step explanation:

3/4 of 24=18

1/4 of 24=6

18+12=30

Wins=30

Losses=6

30:6=5:1

8 0

3 years ago

<img src="https://tex.z-dn.net/?f=14%20%5Ctimes%2014%20%5Cdiv%20%5Cpi%20%7B%3F%7D%5E%7B2%7D%20" id="TexFormula1" title="14 \time

Luda [366]

14x14÷pi²
14x14/pi²

=196/pi²

7 0

4 years ago

Read 2 more answers