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3 years ago

Perfect square immediately before 3

Mathematics

1 answer:

iren2701 [21]3 years ago

8 0

Answer:

hmmmmmmm |[] 3

Step-by-step explanation:

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If the standard deviation for a Poisson distribution is known to be 3.60, the expected value of that Poisson distribution is

Charra [1.4K]

Answer: 12.96

Step-by-step explanation:

given data:

Poisson distributio = 3.60

solution:

The Poisson distribution expected value is same as Variance.

which is expressed as = SD^2

therefore;

the expected value

= SD^2

= 3.60^2

= 12.96

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3 years ago

A source of information randomly generates symbols from a four letter alphabet {w, x, y, z }. The probability of each symbol is

koban [17]

The expected length of code for one encoded symbol is

$\displaystyle\sum_{\alpha\in\{w,x,y,z\}}p_\alpha\ell_\alpha$

where $p_\alpha$ is the probability of picking the letter $\alpha$ , and $\ell_\alpha$ is the length of code needed to encode $\alpha$ . $p_\alpha$ is given to us, and we have

$\begin{cases}\ell_w=1\\\ell_x=2\\\ell_y=\ell_z=3\end{cases}$

so that we expect a contribution of

$\dfrac12+\dfrac24+\dfrac{2\cdot3}8=\dfrac{11}8=1.375$

bits to the code per encoded letter. For a string of length $n$ , we would then expect $E[L]=1.375n$ .

By definition of variance, we have

$\mathrm{Var}[L]=E\left[(L-E[L])^2\right]=E[L^2]-E[L]^2$

For a string consisting of one letter, we have

$\displaystyle\sum_{\alpha\in\{w,x,y,z\}}p_\alpha{\ell_\alpha}^2=\dfrac12+\dfrac{2^2}4+\dfrac{2\cdot3^2}8=\dfrac{15}4$

so that the variance for the length such a string is

$\dfrac{15}4-\left(\dfrac{11}8\right)^2=\dfrac{119}{64}\approx1.859$

"squared" bits per encoded letter. For a string of length $n$ , we would get $\mathrm{Var}[L]=1.859n$ .

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3 years ago

The local sports shop has backpacks on sale for $28. The original price was $40. What is the percent decrease for the backpack p

emmainna [20.7K]

30%. 40-28 =12. 12/40 =30%

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3 years ago

Which equation is equivalent to the formula d = rt? r = d/t r = dt t = r/d t = dr

Allisa [31]

Step-by-step explanation:

d = rt

divide t

d/t = r

r = d/t

6 0

3 years ago

Proof 1 Given: AB║CD , AD║CB Prove: ΔABC ≅ΔCDA

lys-0071 [83]

Statement Reason

AB║CD , AD║CB Given

m∠BAC = m∠ACD Alternate Interior Angles

m∠ACB = m∠CAD Alternate Interior Angles

AC = AC Reflexive Property of Equality

ΔABC ≅ΔCDA ASA ≅

7 0

3 years ago

Perfect square immediately before 3​

Perfect square immediately before 3